| Countries by Number of Books Published | 0 | - | 4.95 | 71,935 |
| Authors by Picture | 0 | - | 4.48 | 25,398 |
| Military History Vocabulary | 0 | - | 4.91 | 66,671 |
| "Second Best" History Edition | 0 | - | 4.93 | 61,885 |
| G7 Leaders Since 2003 | 0 | - | 4.48 | 46,141 |
| Name the English Monarchs | 0 | - | 4.92 | 498,166 |
| WWII Geography | 0 | - | 4.81 | 119,388 |
| WWII Figures by Picture | 0 | - | 4.85 | 50,562 |
| Former Countries by Territory Map | 0 | - | 4.96 | 101,624 |
| Empires by Maps | 0 | - | 4.98 | 118,584 |
| Famous Dictators #1 | 0 | - | 4.69 | 198,830 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,250 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,103 |
| Historical Leaders by Date #1 | 0 | - | 4.48 | 31,230 |
| Historical Leaders by Date #2 | 0 | - | 4.55 | 30,068 |
| Metals of Antiquity | 0 | - | 4.94 | 92,937 |
| Historical Rulers #2 | 0 | - | 4.26 | 47,218 |
| Historical Rulers #1 | 0 | - | 4.35 | 118,497 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,196 |
| History: What Came First? #1 | 0 | - | 4.87 | 104,227 |
| Words for Leaders | 0 | - | 4.77 | 255,235 |
| World Leaders Quiz #1 | 0 | - | 4.11 | 109,661 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 69,676 |
| Influential Women in History | 0 | - | 4.42 | 35,058 |
| Cradles of Civilization | 0 | - | 4.46 | 39,122 |
| Popular Royal Names | 0 | - | 4.27 | 124,499 |
| Materials From History #1 | 0 | - | 4.56 | 50,639 |
| Historical Countries by Ruler | 0 | - | 4.48 | 48,145 |
| Famous Dictators #2 | 0 | - | 4.31 | 87,122 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 704,489 |
| First Names of Painters | 0 | - | 4.43 | 59,606 |
| Biggest Nations and Empires Ever | 0 | - | 4.46 | 145,235 |
| Famous Explorers | 0 | - | 4.58 | 35,969 |
| Famous Empires by Description | 0 | - | 4.70 | 117,875 |
| Answers by Time Period | 0 | - | 4.63 | 55,285 |
| Books with Animals in the Title #1 | 0 | - | 4.41 | 74,323 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,466 |
| History of The Netherlands | 0 | - | 4.46 | 17,320 |
| World Leaders Quiz #2 | 0 | - | 4.00 | 35,662 |
| UN Secretaries-General | 0 | - | 4.40 | 7,764 |
| Benevolent Dictators and Enlightened Despots | 0 | - | 4.01 | 19,546 |
| All Modern-Day Countries Ever Controlled by Turkic People | 0 | - | 4.95 | 40,706 |
| All Modern-Day Countries Ever Controlled by Arab People with a Map | 0 | - | 4.98 | 54,882 |
| Books by Country Quiz | 0 | - | 4.30 | 32,178 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 285,079 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 268,511 |
| Countries with NO Military | 0 | - | 4.97 | 61,211 |
| Countries with the Most Elite Universities | 0 | - | 4.94 | 146,822 |
| NATO Countries | 0 | - | 4.98 | 275,964 |
| EU Countries Quiz | 0 | - | 4.99 | 270,100 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,133 |
| 7 Deadly Sins | 0 | - | 4.88 | 395,197 |
| Books of the Protestant Bible | 0 | - | 4.89 | 207,344 |
| Majority Muslim Countries | 0 | - | 4.98 | 368,672 |
| Former Flags | 0 | - | 4.97 | 106,744 |
| Years in History by Picture | 0 | - | 4.44 | 35,126 |
| Historical Events - AD or BC? | 0 | - | 4.70 | 57,207 |
| Materials From History #2 | 0 | - | 4.59 | 30,924 |
| WWII Decoder | 0 | - | 4.41 | 53,056 |
| Name a Valid Answer - World War II | 0 | - | 4.53 | 54,774 |
| Cold War Decoder | 0 | - | 4.83 | 51,947 |
| 20th Century Dates Quiz | 0 | - | 4.56 | 39,325 |
| Events in History #2 | 0 | - | 4.49 | 71,446 |
| Events in History #4 | 0 | - | 4.44 | 44,116 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,449 |
| Infamous Criminals - Mostly U.S. | 0 | - | 4.21 | 48,827 |
| Assassinations in History | 0 | - | 4.21 | 65,971 |
| Famous Seconds | 0 | - | 4.22 | 46,400 |
| Ages and Eras | 0 | - | 4.38 | 67,475 |
| Celebrity Knights of the United Kingdom | 0 | - | 4.23 | 39,405 |
| Titled People Quiz #1 | 0 | - | 4.10 | 45,621 |
| Titled People Quiz #3 | 0 | - | 4.34 | 43,042 |
| Job Titles Quiz #1 | 0 | - | 4.22 | 75,829 |
| Female Historical Figures | 0 | - | 4.31 | 33,110 |
| Historical Blunders | 0 | - | 4.33 | 91,703 |
| People Who Died in Battle | 0 | - | 4.35 | 22,271 |
| Territorial Accessions | 0 | - | 4.38 | 34,643 |
| People Known as "The Great" | 0 | - | 4.46 | 24,530 |
| This Day in History - July | 0 | - | 4.49 | 36,373 |
| This Day in History - August | 0 | - | 4.42 | 43,257 |
| This Day in History - September | 0 | - | 4.55 | 57,270 |
| This Day in History - October | 0 | - | 4.49 | 37,555 |
| This Day in History - January | 0 | - | 4.53 | 46,577 |
| This Day in History - March | 0 | - | 4.45 | 43,547 |
| Ancient Civilizations | 0 | - | 4.63 | 37,769 |
| The Places They Went #1 | 0 | - | 4.74 | 33,448 |
| Famous Inventors | 0 | - | 4.43 | 43,462 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,498 |
| European History for Dummies | 0 | - | 4.82 | 89,342 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,313 |
| 40 Historical People that Everyone Should Know | 0 | - | 4.09 | 1,011,061 |
| Countries with the Most Tanks | 0 | - | 4.91 | 106,317 |
| Coldest World Capitals | 0 | - | 4.95 | 133,065 |
| World Currency Quiz | 0 | - | 4.92 | 298,663 |
| Countries with the Most Billionaires | 0 | - | 4.90 | 332,973 |
| Countries with the Most Millionaires | 0 | - | 4.86 | 122,153 |
| Biggest Export Partners For Every Country | 0 | - | 4.98 | 49,777 |
| Top Oil Reserve Countries | 0 | - | 4.93 | 74,170 |
| Cities with the Biggest Economies | 0 | - | 4.91 | 129,732 |
| Countries with the Most Christians | 0 | - | 4.92 | 141,520 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 86,964 |
| Buddhist Countries | 0 | - | 4.96 | 142,988 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,091,049 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 317,159 |
| The 2nd Millennium BC | 0 | - | 4.64 | 20,706 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,121 |
| History Analogies #1 | 0 | - | 4.53 | 89,790 |
| History Analogies #2 | 0 | - | 4.49 | 77,010 |
| Current Events by Year, 1990–2009 | 0 | - | 4.77 | 152,154 |
| Current Events by Year, 1970–1989 | 0 | - | 4.56 | 64,965 |
| Current Events by Year, 1930–1949 | 0 | - | 4.48 | 51,934 |
| History Analogies #3 | 0 | - | 4.61 | 80,445 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,165 |
| Which Came First? | 0 | - | 4.37 | 74,414 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,991 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,543 |
| Random History by Country | 0 | - | 4.53 | 34,667 |
| Valid Answer - World History #1 | 0 | - | 4.56 | 61,564 |
| Animals in World History | 0 | - | 4.74 | 44,231 |
| People - Real or Fictional? | 0 | - | 4.56 | 58,481 |
| Places - Real or Fictional? | 0 | - | 4.59 | 49,370 |
| History True or False #3 | 0 | - | 4.43 | 55,943 |
| World Leaders of the World Wars | 0 | - | 4.35 | 37,660 |
| World Leaders of the Cold War | 0 | - | 4.27 | 25,126 |
| Five Most Guessed World Leaders by Country | 0 | - | 4.18 | 47,726 |
| The Dictator Files: Adolf Hitler | 0 | - | 4.79 | 77,352 |
| A to Z: Legendary Creatures | 0 | - | 4.26 | 52,767 |
| WWII First Names | 0 | - | 4.44 | 41,575 |
| WWII for Dummies | 0 | - | 4.80 | 103,883 |
| Cold War Trivia #1 | 0 | - | 4.41 | 56,968 |
| Events in History #3 | 0 | - | 4.40 | 71,463 |
| Events in History #1 | 0 | - | 4.34 | 157,297 |
| Events in Ancient History | 0 | - | 4.50 | 35,729 |
| People Who Died Young #1 | 0 | - | 4.24 | 63,544 |
| Deaths by Date and Cause #1 | 0 | - | 4.37 | 94,906 |
| Deaths by Date and Cause #2 | 0 | - | 4.15 | 67,493 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 73,577 |
| Countries That Were Invaded | 0 | - | 4.54 | 96,929 |
| Political Quotes | 0 | - | 4.17 | 19,804 |
| This Day in History - April | 0 | - | 4.40 | 44,394 |
| This Day in History - May | 0 | - | 4.33 | 48,257 |
| This Day in History - June | 0 | - | 4.36 | 33,435 |
| This Day in History - November | 0 | - | 4.24 | 33,534 |
| This Day in History - December | 0 | - | 4.32 | 40,453 |
| This Day in History - February | 0 | - | 4.38 | 39,703 |
| The 19th Century | 0 | - | 4.53 | 67,886 |
| The 18th Century | 0 | - | 4.52 | 53,124 |
| The 16th Century | 0 | - | 4.77 | 58,742 |
| The 9th and 10th Century | 0 | - | 4.54 | 37,540 |
| The 21st Century | 0 | - | 4.48 | 105,317 |
| Battle to Country | 0 | - | 4.91 | 52,561 |
| The Life of King David | 0 | - | 4.37 | 14,061 |
| History Multiple Choice #1 | 0 | - | 4.46 | 81,532 |
| Years in History #2 - Multiple Choice | 0 | - | 4.43 | 41,420 |
| History Multiple Choice #2 | 0 | - | 4.43 | 49,816 |
| History Multiple Choice #3 | 0 | - | 4.45 | 48,550 |
| History Multiple Choice #5 | 0 | - | 4.49 | 32,270 |
| Three Real and One Fake - World History | 0 | - | 4.44 | 38,194 |
| English Royal Consorts | 0 | - | 4.37 | 37,179 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,620 |
| British History A-Z #1 | 0 | - | 4.45 | 45,957 |
| Kings of France Quiz | 0 | - | 4.20 | 32,568 |
| Dark Ages History | 0 | - | 4.42 | 32,681 |
| 30 Historical People You Probably Don't Know | 0 | - | 4.36 | 60,825 |
| Name that Historical Figure #1 | 0 | - | 4.63 | 335,585 |
| World Capitals in the Answer | 0 | - | 4.94 | 76,332 |
| Monarchies of Europe | 0 | - | 4.90 | 97,359 |
| Monarchies of Asia | 0 | - | 4.97 | 70,617 |
| Capital Cities with the Least Precipitation | 0 | - | 4.89 | 29,039 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 193,964 |
| Countries with the Most Exports | 0 | - | 4.96 | 154,209 |
| Top Crude Oil Producing Countries | 0 | - | 4.89 | 188,542 |
| Countries by Oil Consumption | 0 | - | 4.96 | 119,570 |
| Richest Island Countries | 0 | - | 4.84 | 99,558 |
| Largest Economies in 2050 | 0 | - | 4.90 | 110,683 |
| Capitals of Countries with the Biggest Economies | 0 | - | 4.93 | 94,734 |
| Richest Countries by Per-Capita GDP | 0 | - | 4.96 | 262,243 |
| Countries With Highest GDP as a Percent of Continent | 0 | - | 4.95 | 102,989 |
| Countries with the Highest GDP per Square Kilometer | 0 | - | 4.90 | 83,749 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,390 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 110,637 |
| Countries with the Most Catholics | 0 | - | 4.90 | 108,092 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,263 |
| Orthodox Countries | 0 | - | 4.91 | 130,438 |
| Countries with the Most Muslims | 0 | - | 4.95 | 159,312 |
| The Sun Quiz | 0 | - | 4.93 | 34,136 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,663 |
| Capital Cities by Cartoon Riddles | 0 | - | 4.98 | 86,688 |
| Divided World City Name Puzzle #1 | 0 | - | 4.88 | 48,122 |
| Divided World City Name Puzzle #2 | 0 | - | 4.83 | 36,488 |
| Countries that Start with A | 0 | - | 4.97 | 2,147,452 |
| Countries that Start with B | 0 | - | 4.95 | 2,280,401 |
| Countries that Start with C | 0 | - | 4.96 | 1,810,778 |
| Countries that Start with D | 0 | - | 4.96 | 701,864 |
| Countries that Start with E | 0 | - | 4.95 | 1,367,894 |
| Countries that Start with G | 0 | - | 4.97 | 1,493,229 |
| Countries that Start with H | 0 | - | 4.96 | 598,226 |
| Countries that Start with I | 0 | - | 4.92 | 1,280,573 |
| Countries that Start with J | 0 | - | 4.98 | 596,279 |
| Countries that Start with K | 0 | - | 4.97 | 809,625 |
