| Countries by Number of Books Published | 0 | - | 4.95 | 71,898 |
| Authors by Picture | 0 | - | 4.48 | 25,391 |
| Military History Vocabulary | 0 | - | 4.91 | 66,641 |
| "Second Best" History Edition | 0 | - | 4.94 | 61,785 |
| G7 Leaders Since 2003 | 0 | - | 4.48 | 46,126 |
| Name the English Monarchs | 0 | - | 4.92 | 497,838 |
| WWII Geography | 0 | - | 4.81 | 119,331 |
| WWII Figures by Picture | 0 | - | 4.85 | 50,515 |
| Former Countries by Territory Map | 0 | - | 4.96 | 101,519 |
| Empires by Maps | 0 | - | 4.98 | 118,456 |
| Famous Dictators #1 | 0 | - | 4.69 | 198,762 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,216 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,086 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,040 |
| Roman Emperors | 0 | - | 4.95 | 118,464 |
| Historical Leaders by Date #1 | 0 | - | 4.48 | 31,217 |
| Historical Leaders by Date #2 | 0 | - | 4.55 | 30,057 |
| Metals of Antiquity | 0 | - | 4.94 | 92,897 |
| Historical Rulers #2 | 0 | - | 4.26 | 47,203 |
| Historical Rulers #1 | 0 | - | 4.35 | 118,473 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,158 |
| History: What Came First? #1 | 0 | - | 4.87 | 104,174 |
| Words for Leaders | 0 | - | 4.77 | 255,110 |
| World Leaders Quiz #1 | 0 | - | 4.11 | 109,630 |
| Ancient Rome - True or False? | 0 | - | 4.85 | 42,607 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 69,649 |
| Influential Women in History | 0 | - | 4.42 | 34,978 |
| Cradles of Civilization | 0 | - | 4.46 | 39,044 |
| Popular Royal Names | 0 | - | 4.27 | 124,470 |
| Materials From History #1 | 0 | - | 4.56 | 50,590 |
| Historical Countries by Ruler | 0 | - | 4.48 | 48,067 |
| Famous Dictators #2 | 0 | - | 4.31 | 87,090 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 704,302 |
| First Names of Painters | 0 | - | 4.43 | 59,595 |
| Biggest Nations and Empires Ever | 0 | - | 4.46 | 145,165 |
| Famous Explorers | 0 | - | 4.58 | 35,942 |
| Famous Empires by Description | 0 | - | 4.70 | 117,537 |
| Answers by Time Period | 0 | - | 4.63 | 55,261 |
| Books with Animals in the Title #1 | 0 | - | 4.41 | 74,287 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,441 |
| History of The Netherlands | 0 | - | 4.46 | 17,310 |
| World Leaders Quiz #2 | 0 | - | 4.00 | 35,652 |
| UN Secretaries-General | 0 | - | 4.40 | 7,761 |
| Benevolent Dictators and Enlightened Despots | 0 | - | 4.01 | 19,544 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,769 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,767 |
| All Modern-Day Countries Ever Controlled by Turkic People | 0 | - | 4.95 | 40,688 |
| All Modern-Day Countries Ever Controlled by Arab People with a Map | 0 | - | 4.98 | 54,855 |
| Books by Country Quiz | 0 | - | 4.30 | 32,176 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 284,887 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 268,234 |
| Countries with NO Military | 0 | - | 4.97 | 61,159 |
| Countries with the Most Elite Universities | 0 | - | 4.94 | 146,740 |
| NATO Countries | 0 | - | 4.98 | 275,671 |
| EU Countries Quiz | 0 | - | 4.99 | 269,881 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,015 |
| 7 Deadly Sins | 0 | - | 4.88 | 394,828 |
| Books of the Protestant Bible | 0 | - | 4.89 | 207,165 |
| Majority Muslim Countries | 0 | - | 4.98 | 368,471 |
| Former Flags | 0 | - | 4.97 | 106,669 |
| Years in History by Picture | 0 | - | 4.44 | 35,100 |
| Historical Events - AD or BC? | 0 | - | 4.70 | 57,181 |
| Materials From History #2 | 0 | - | 4.59 | 30,909 |
| WWII Decoder | 0 | - | 4.41 | 53,035 |
| Name a Valid Answer - World War II | 0 | - | 4.53 | 54,745 |
| Cold War Decoder | 0 | - | 4.83 | 51,916 |
| 20th Century Dates Quiz | 0 | - | 4.56 | 39,317 |
| Events in History #2 | 0 | - | 4.49 | 71,420 |
| Events in History #4 | 0 | - | 4.44 | 44,093 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,380 |
| Infamous Criminals - Mostly U.S. | 0 | - | 4.21 | 48,815 |
| Assassinations in History | 0 | - | 4.20 | 65,948 |
| Famous Seconds | 0 | - | 4.22 | 46,390 |
| Ages and Eras | 0 | - | 4.38 | 67,452 |
| Celebrity Knights of the United Kingdom | 0 | - | 4.23 | 39,396 |
| Titled People Quiz #1 | 0 | - | 4.10 | 45,611 |
| Titled People Quiz #3 | 0 | - | 4.34 | 43,034 |
| Job Titles Quiz #1 | 0 | - | 4.22 | 75,819 |
| Female Historical Figures | 0 | - | 4.31 | 33,094 |
| Historical Blunders | 0 | - | 4.33 | 91,671 |
| Territorial Accessions | 0 | - | 4.38 | 34,627 |
| People Known as "The Great" | 0 | - | 4.46 | 24,517 |
| This Day in History - July | 0 | - | 4.49 | 36,369 |
| This Day in History - August | 0 | - | 4.42 | 43,250 |
| This Day in History - September | 0 | - | 4.55 | 57,258 |
| 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 | 43,541 |
| Ancient Civilizations | 0 | - | 4.63 | 37,751 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,530 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,662 |
| Roman Names for Places | 0 | - | 4.62 | 57,870 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,428 |
| The Places They Went #1 | 0 | - | 4.74 | 33,443 |
| Famous Inventors | 0 | - | 4.43 | 43,452 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,469 |
| European History for Dummies | 0 | - | 4.83 | 89,312 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,290 |
| 40 Historical People that Everyone Should Know | 0 | - | 4.09 | 1,010,879 |
| Countries with the Most Tanks | 0 | - | 4.91 | 106,246 |
| Coldest World Capitals | 0 | - | 4.95 | 133,038 |
| World Currency Quiz | 0 | - | 4.92 | 298,393 |
| Countries with the Most Billionaires | 0 | - | 4.90 | 332,835 |
| Countries with the Most Millionaires | 0 | - | 4.86 | 122,066 |
| Biggest Export Partners For Every Country | 0 | - | 4.98 | 49,731 |
| Top Oil Reserve Countries | 0 | - | 4.93 | 74,119 |
| Cities with the Biggest Economies | 0 | - | 4.91 | 129,670 |
| Countries with the Most Christians | 0 | - | 4.92 | 141,428 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 86,909 |
| Buddhist Countries | 0 | - | 4.96 | 142,933 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,090,612 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 316,966 |
| The 2nd Millennium BC | 0 | - | 4.64 | 20,697 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,094 |
| History Analogies #1 | 0 | - | 4.53 | 89,775 |
| History Analogies #2 | 0 | - | 4.49 | 76,993 |
| Current Events by Year, 1990–2009 | 0 | - | 4.77 | 152,120 |
| Current Events by Year, 1970–1989 | 0 | - | 4.56 | 64,948 |
| Current Events by Year, 1930–1949 | 0 | - | 4.48 | 51,925 |
| History Analogies #3 | 0 | - | 4.61 | 80,428 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,139 |
| Which Came First? | 0 | - | 4.37 | 74,396 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,983 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,517 |
| Random History by Country | 0 | - | 4.53 | 34,655 |
| Valid Answer - World History #1 | 0 | - | 4.56 | 61,540 |
| Animals in World History | 0 | - | 4.74 | 44,214 |
| People - Real or Fictional? | 0 | - | 4.56 | 58,458 |
| Places - Real or Fictional? | 0 | - | 4.59 | 49,352 |
| History True or False #3 | 0 | - | 4.43 | 55,915 |
| World Leaders of the World Wars | 0 | - | 4.35 | 37,650 |
| World Leaders of the Cold War | 0 | - | 4.27 | 25,118 |
| Five Most Guessed World Leaders by Country | 0 | - | 4.18 | 47,502 |
| The Dictator Files: Adolf Hitler | 0 | - | 4.79 | 77,312 |
| A to Z: Legendary Creatures | 0 | - | 4.26 | 52,739 |
| WWII First Names | 0 | - | 4.44 | 41,559 |
| WWII for Dummies | 0 | - | 4.80 | 103,818 |
| Cold War Trivia #1 | 0 | - | 4.41 | 56,953 |
| Events in History #3 | 0 | - | 4.40 | 71,443 |
| Events in History #1 | 0 | - | 4.34 | 157,263 |
| Events in Ancient History | 0 | - | 4.50 | 35,703 |
| People Who Died Young #1 | 0 | - | 4.24 | 63,539 |
| Deaths by Date and Cause #1 | 0 | - | 4.37 | 94,885 |
| Deaths by Date and Cause #2 | 0 | - | 4.15 | 67,471 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 73,541 |
| Countries That Were Invaded | 0 | - | 4.54 | 96,912 |
| Political Quotes | 0 | - | 4.17 | 19,802 |
| This Day in History - April | 0 | - | 4.40 | 44,390 |
| This Day in History - May | 0 | - | 4.33 | 48,249 |
| This Day in History - June | 0 | - | 4.36 | 33,431 |
| This Day in History - November | 0 | - | 4.24 | 33,532 |
| This Day in History - December | 0 | - | 4.32 | 40,450 |
| This Day in History - February | 0 | - | 4.38 | 39,699 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,117 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,422 |
| The 19th Century | 0 | - | 4.53 | 67,877 |
| The 18th Century | 0 | - | 4.52 | 53,115 |
| The 16th Century | 0 | - | 4.77 | 58,733 |
| The 9th and 10th Century | 0 | - | 4.54 | 37,536 |
| The 21st Century | 0 | - | 4.48 | 105,278 |
| Battle to Country | 0 | - | 4.91 | 52,509 |
| The Life of King David | 0 | - | 4.37 | 14,058 |
| History Multiple Choice #1 | 0 | - | 4.46 | 81,509 |
| Years in History #2 - Multiple Choice | 0 | - | 4.43 | 41,404 |
| History Multiple Choice #2 | 0 | - | 4.43 | 49,797 |
| History Multiple Choice #3 | 0 | - | 4.45 | 48,537 |
| History Multiple Choice #5 | 0 | - | 4.49 | 32,260 |
| Three Real and One Fake - World History | 0 | - | 4.44 | 38,186 |
| English Royal Consorts | 0 | - | 4.37 | 37,157 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,608 |
| British History A-Z #1 | 0 | - | 4.45 | 45,803 |
| Kings of France Quiz | 0 | - | 4.20 | 32,551 |
| Dark Ages History | 0 | - | 4.42 | 32,675 |
| 30 Historical People You Probably Don't Know | 0 | - | 4.36 | 60,807 |
| Name that Historical Figure #1 | 0 | - | 4.63 | 335,477 |
| World Capitals in the Answer | 0 | - | 4.94 | 76,291 |
| Monarchies of Europe | 0 | - | 4.90 | 97,303 |
| Monarchies of Asia | 0 | - | 4.97 | 70,592 |
| Capital Cities with the Least Precipitation | 0 | - | 4.89 | 29,026 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 193,893 |
| Countries with the Most Exports | 0 | - | 4.96 | 154,153 |
| Top Crude Oil Producing Countries | 0 | - | 4.89 | 188,479 |
| Countries by Oil Consumption | 0 | - | 4.96 | 119,544 |
| Richest Island Countries | 0 | - | 4.84 | 99,505 |
| Largest Economies in 2050 | 0 | - | 4.90 | 110,634 |
| Capitals of Countries with the Biggest Economies | 0 | - | 4.93 | 94,696 |
| Richest Countries by Per-Capita GDP | 0 | - | 4.96 | 262,062 |
| Countries With Highest GDP as a Percent of Continent | 0 | - | 4.95 | 102,929 |
| Countries with the Highest GDP per Square Kilometer | 0 | - | 4.90 | 83,705 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,310 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 110,580 |
| Countries with the Most Catholics | 0 | - | 4.90 | 108,023 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,209 |
| Orthodox Countries | 0 | - | 4.91 | 130,362 |
| Countries with the Most Muslims | 0 | - | 4.95 | 159,263 |
| The Sun Quiz | 0 | - | 4.93 | 34,105 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,636 |
| Capital Cities by Cartoon Riddles | 0 | - | 4.98 | 86,646 |
| Divided World City Name Puzzle #1 | 0 | - | 4.88 | 48,089 |
| Divided World City Name Puzzle #2 | 0 | - | 4.83 | 36,468 |
