| Countries by Number of Books Published | 0 | - | 4.95 | 71,903 |
| Authors by Picture | 0 | - | 4.48 | 25,392 |
| Military History Vocabulary | 0 | - | 4.91 | 66,650 |
| "Second Best" History Edition | 0 | - | 4.94 | 61,812 |
| G7 Leaders Since 2003 | 0 | - | 4.48 | 46,129 |
| Name the English Monarchs | 0 | - | 4.92 | 497,909 |
| WWII Geography | 0 | - | 4.81 | 119,349 |
| WWII Figures by Picture | 0 | - | 4.85 | 50,528 |
| Former Countries by Territory Map | 0 | - | 4.96 | 101,549 |
| Empires by Maps | 0 | - | 4.98 | 118,503 |
| Famous Dictators #1 | 0 | - | 4.69 | 198,776 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,227 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,089 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,046 |
| Roman Emperors | 0 | - | 4.95 | 118,491 |
| Historical Leaders by Date #1 | 0 | - | 4.48 | 31,221 |
| Historical Leaders by Date #2 | 0 | - | 4.55 | 30,060 |
| Metals of Antiquity | 0 | - | 4.94 | 92,908 |
| Historical Rulers #2 | 0 | - | 4.26 | 47,209 |
| Historical Rulers #1 | 0 | - | 4.35 | 118,479 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,168 |
| History: What Came First? #1 | 0 | - | 4.87 | 104,195 |
| Words for Leaders | 0 | - | 4.77 | 255,141 |
| World Leaders Quiz #1 | 0 | - | 4.11 | 109,636 |
| Ancient Rome - True or False? | 0 | - | 4.85 | 42,615 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 69,655 |
| Influential Women in History | 0 | - | 4.42 | 35,005 |
| Cradles of Civilization | 0 | - | 4.46 | 39,062 |
| Popular Royal Names | 0 | - | 4.27 | 124,479 |
| Materials From History #1 | 0 | - | 4.56 | 50,604 |
| Historical Countries by Ruler | 0 | - | 4.48 | 48,098 |
| Famous Dictators #2 | 0 | - | 4.31 | 87,094 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 704,346 |
| First Names of Painters | 0 | - | 4.43 | 59,597 |
| Biggest Nations and Empires Ever | 0 | - | 4.46 | 145,184 |
| Famous Explorers | 0 | - | 4.58 | 35,947 |
| Famous Empires by Description | 0 | - | 4.70 | 117,547 |
| Answers by Time Period | 0 | - | 4.63 | 55,267 |
| Books with Animals in the Title #1 | 0 | - | 4.41 | 74,297 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,447 |
| History of The Netherlands | 0 | - | 4.46 | 17,311 |
| World Leaders Quiz #2 | 0 | - | 4.00 | 35,655 |
| UN Secretaries-General | 0 | - | 4.40 | 7,761 |
| Benevolent Dictators and Enlightened Despots | 0 | - | 4.01 | 19,544 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,775 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,771 |
| All Modern-Day Countries Ever Controlled by Turkic People | 0 | - | 4.95 | 40,691 |
| All Modern-Day Countries Ever Controlled by Arab People with a Map | 0 | - | 4.98 | 54,860 |
| Books by Country Quiz | 0 | - | 4.30 | 32,177 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 284,927 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 268,305 |
| Countries with NO Military | 0 | - | 4.97 | 61,174 |
| Countries with the Most Elite Universities | 0 | - | 4.94 | 146,755 |
| NATO Countries | 0 | - | 4.98 | 275,739 |
| EU Countries Quiz | 0 | - | 4.99 | 269,923 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,044 |
| 7 Deadly Sins | 0 | - | 4.88 | 394,902 |
| Books of the Protestant Bible | 0 | - | 4.89 | 207,224 |
| Majority Muslim Countries | 0 | - | 4.98 | 368,517 |
| Former Flags | 0 | - | 4.97 | 106,694 |
| Years in History by Picture | 0 | - | 4.44 | 35,107 |
| Historical Events - AD or BC? | 0 | - | 4.70 | 57,189 |
| Materials From History #2 | 0 | - | 4.59 | 30,914 |
| WWII Decoder | 0 | - | 4.41 | 53,040 |
| Name a Valid Answer - World War II | 0 | - | 4.53 | 54,753 |
| Cold War Decoder | 0 | - | 4.83 | 51,928 |
| 20th Century Dates Quiz | 0 | - | 4.56 | 39,319 |
| Events in History #2 | 0 | - | 4.49 | 71,429 |
| Events in History #4 | 0 | - | 4.44 | 44,097 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,396 |
| Infamous Criminals - Mostly U.S. | 0 | - | 4.21 | 48,819 |
| Assassinations in History | 0 | - | 4.20 | 65,956 |
| Famous Seconds | 0 | - | 4.22 | 46,393 |
| Ages and Eras | 0 | - | 4.38 | 67,456 |
| Celebrity Knights of the United Kingdom | 0 | - | 4.23 | 39,398 |
| Titled People Quiz #1 | 0 | - | 4.10 | 45,613 |
| Titled People Quiz #3 | 0 | - | 4.34 | 43,039 |
| Job Titles Quiz #1 | 0 | - | 4.22 | 75,821 |
| Female Historical Figures | 0 | - | 4.31 | 33,097 |
| Historical Blunders | 0 | - | 4.33 | 91,679 |
| Territorial Accessions | 0 | - | 4.38 | 34,632 |
| People Known as "The Great" | 0 | - | 4.46 | 24,522 |
| This Day in History - July | 0 | - | 4.49 | 36,371 |
| This Day in History - August | 0 | - | 4.42 | 43,253 |
| This Day in History - September | 0 | - | 4.55 | 57,261 |
| This Day in History - October | 0 | - | 4.49 | 37,554 |
| This Day in History - January | 0 | - | 4.53 | 46,573 |
| This Day in History - March | 0 | - | 4.45 | 43,545 |
| Ancient Civilizations | 0 | - | 4.63 | 37,759 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,533 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,669 |
| Roman Names for Places | 0 | - | 4.62 | 57,878 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,435 |
| The Places They Went #1 | 0 | - | 4.74 | 33,444 |
| Famous Inventors | 0 | - | 4.43 | 43,454 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,473 |
| European History for Dummies | 0 | - | 4.83 | 89,316 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,296 |
| 40 Historical People that Everyone Should Know | 0 | - | 4.09 | 1,010,928 |
| Countries with the Most Tanks | 0 | - | 4.91 | 106,264 |
| Coldest World Capitals | 0 | - | 4.95 | 133,041 |
| World Currency Quiz | 0 | - | 4.92 | 298,471 |
| Countries with the Most Billionaires | 0 | - | 4.90 | 332,869 |
| Countries with the Most Millionaires | 0 | - | 4.86 | 122,087 |
| Biggest Export Partners For Every Country | 0 | - | 4.98 | 49,743 |
| Top Oil Reserve Countries | 0 | - | 4.93 | 74,138 |
| Cities with the Biggest Economies | 0 | - | 4.91 | 129,687 |
| Countries with the Most Christians | 0 | - | 4.92 | 141,455 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 86,922 |
| Buddhist Countries | 0 | - | 4.96 | 142,952 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,090,724 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 317,013 |
| The 2nd Millennium BC | 0 | - | 4.64 | 20,699 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,099 |
| History Analogies #1 | 0 | - | 4.53 | 89,781 |
| History Analogies #2 | 0 | - | 4.49 | 76,999 |
| Current Events by Year, 1990–2009 | 0 | - | 4.77 | 152,128 |
| Current Events by Year, 1970–1989 | 0 | - | 4.56 | 64,953 |
| Current Events by Year, 1930–1949 | 0 | - | 4.48 | 51,925 |
| History Analogies #3 | 0 | - | 4.61 | 80,432 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,147 |
| Which Came First? | 0 | - | 4.37 | 74,401 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,984 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,520 |
| Random History by Country | 0 | - | 4.53 | 34,659 |
| Valid Answer - World History #1 | 0 | - | 4.56 | 61,542 |
| Animals in World History | 0 | - | 4.74 | 44,216 |
| People - Real or Fictional? | 0 | - | 4.56 | 58,462 |
| Places - Real or Fictional? | 0 | - | 4.59 | 49,354 |
| History True or False #3 | 0 | - | 4.43 | 55,926 |
| World Leaders of the World Wars | 0 | - | 4.35 | 37,650 |
| World Leaders of the Cold War | 0 | - | 4.27 | 25,119 |
| Five Most Guessed World Leaders by Country | 0 | - | 4.18 | 47,562 |
| The Dictator Files: Adolf Hitler | 0 | - | 4.79 | 77,320 |
| A to Z: Legendary Creatures | 0 | - | 4.26 | 52,747 |
| WWII First Names | 0 | - | 4.44 | 41,561 |
| WWII for Dummies | 0 | - | 4.80 | 103,839 |
| Cold War Trivia #1 | 0 | - | 4.41 | 56,961 |
| Events in History #3 | 0 | - | 4.40 | 71,451 |
| Events in History #1 | 0 | - | 4.34 | 157,276 |
| Events in Ancient History | 0 | - | 4.50 | 35,715 |
| People Who Died Young #1 | 0 | - | 4.24 | 63,540 |
| Deaths by Date and Cause #1 | 0 | - | 4.37 | 94,889 |
| Deaths by Date and Cause #2 | 0 | - | 4.15 | 67,479 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 73,550 |
| Countries That Were Invaded | 0 | - | 4.54 | 96,915 |
| Political Quotes | 0 | - | 4.17 | 19,802 |
| This Day in History - April | 0 | - | 4.40 | 44,392 |
| This Day in History - May | 0 | - | 4.33 | 48,251 |
| This Day in History - June | 0 | - | 4.36 | 33,433 |
| This Day in History - November | 0 | - | 4.24 | 33,533 |
| This Day in History - December | 0 | - | 4.32 | 40,452 |
| This Day in History - February | 0 | - | 4.38 | 39,701 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,117 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,423 |
| The 19th Century | 0 | - | 4.53 | 67,879 |
| The 18th Century | 0 | - | 4.52 | 53,117 |
| The 16th Century | 0 | - | 4.77 | 58,736 |
| The 9th and 10th Century | 0 | - | 4.54 | 37,538 |
| The 21st Century | 0 | - | 4.48 | 105,293 |
| Battle to Country | 0 | - | 4.91 | 52,525 |
| The Life of King David | 0 | - | 4.37 | 14,059 |
| History Multiple Choice #1 | 0 | - | 4.46 | 81,516 |
| Years in History #2 - Multiple Choice | 0 | - | 4.43 | 41,411 |
| History Multiple Choice #2 | 0 | - | 4.43 | 49,804 |
| History Multiple Choice #3 | 0 | - | 4.45 | 48,541 |
| History Multiple Choice #5 | 0 | - | 4.49 | 32,264 |
| Three Real and One Fake - World History | 0 | - | 4.44 | 38,188 |
| English Royal Consorts | 0 | - | 4.37 | 37,163 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,612 |
| British History A-Z #1 | 0 | - | 4.45 | 45,814 |
| Kings of France Quiz | 0 | - | 4.20 | 32,556 |
| Dark Ages History | 0 | - | 4.42 | 32,677 |
| 30 Historical People You Probably Don't Know | 0 | - | 4.36 | 60,811 |
| Name that Historical Figure #1 | 0 | - | 4.63 | 335,510 |
| World Capitals in the Answer | 0 | - | 4.94 | 76,300 |
| Monarchies of Europe | 0 | - | 4.90 | 97,313 |
| Monarchies of Asia | 0 | - | 4.97 | 70,603 |
| Capital Cities with the Least Precipitation | 0 | - | 4.89 | 29,029 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 193,906 |
| Countries with the Most Exports | 0 | - | 4.96 | 154,168 |
| Top Crude Oil Producing Countries | 0 | - | 4.89 | 188,491 |
| Countries by Oil Consumption | 0 | - | 4.96 | 119,552 |
| Richest Island Countries | 0 | - | 4.84 | 99,516 |
| Largest Economies in 2050 | 0 | - | 4.90 | 110,645 |
| Capitals of Countries with the Biggest Economies | 0 | - | 4.93 | 94,704 |
| Richest Countries by Per-Capita GDP | 0 | - | 4.96 | 262,108 |
| Countries With Highest GDP as a Percent of Continent | 0 | - | 4.95 | 102,941 |
| Countries with the Highest GDP per Square Kilometer | 0 | - | 4.90 | 83,714 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,328 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 110,594 |
| Countries with the Most Catholics | 0 | - | 4.90 | 108,042 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,215 |
| Orthodox Countries | 0 | - | 4.91 | 130,385 |
| Countries with the Most Muslims | 0 | - | 4.95 | 159,276 |
| The Sun Quiz | 0 | - | 4.93 | 34,109 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,645 |
| Capital Cities by Cartoon Riddles | 0 | - | 4.98 | 86,653 |
| Divided World City Name Puzzle #1 | 0 | - | 4.88 | 48,097 |
| Divided World City Name Puzzle #2 | 0 | - | 4.83 | 36,470 |
