| Countries by Number of Books Published | 0 | - | 4.95 | 71,865 |
| Authors by Picture | 0 | - | 4.48 | 25,388 |
| Military History Vocabulary | 0 | - | 4.91 | 66,608 |
| "Second Best" History Edition | 0 | - | 4.94 | 61,672 |
| G7 Leaders Since 2003 | 0 | - | 4.48 | 46,098 |
| Name the English Monarchs | 0 | - | 4.92 | 497,589 |
| WWII Geography | 0 | - | 4.81 | 119,292 |
| WWII Figures by Picture | 0 | - | 4.85 | 50,453 |
| Former Countries by Territory Map | 0 | - | 4.96 | 101,387 |
| Empires by Maps | 0 | - | 4.98 | 118,263 |
| Famous Dictators #1 | 0 | - | 4.69 | 198,676 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,167 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,056 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,006 |
| Roman Emperors | 0 | - | 4.95 | 118,356 |
| Historical Leaders by Date #1 | 0 | - | 4.48 | 31,209 |
| Historical Leaders by Date #2 | 0 | - | 4.55 | 30,040 |
| Metals of Antiquity | 0 | - | 4.94 | 92,842 |
| Historical Rulers #2 | 0 | - | 4.26 | 47,184 |
| Historical Rulers #1 | 0 | - | 4.35 | 118,448 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,110 |
| History: What Came First? #1 | 0 | - | 4.87 | 104,107 |
| Words for Leaders | 0 | - | 4.77 | 254,980 |
| World Leaders Quiz #1 | 0 | - | 4.11 | 109,614 |
| Ancient Rome - True or False? | 0 | - | 4.85 | 42,586 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 69,627 |
| Influential Women in History | 0 | - | 4.42 | 34,915 |
| Cradles of Civilization | 0 | - | 4.46 | 38,976 |
| Popular Royal Names | 0 | - | 4.27 | 124,447 |
| Materials From History #1 | 0 | - | 4.56 | 50,532 |
| Historical Countries by Ruler | 0 | - | 4.48 | 48,003 |
| Famous Dictators #2 | 0 | - | 4.31 | 87,064 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 704,103 |
| First Names of Painters | 0 | - | 4.43 | 59,582 |
| Biggest Nations and Empires Ever | 0 | - | 4.46 | 145,086 |
| Famous Explorers | 0 | - | 4.58 | 35,923 |
| Famous Empires by Description | 0 | - | 4.70 | 117,484 |
| Answers by Time Period | 0 | - | 4.63 | 55,239 |
| Books with Animals in the Title #1 | 0 | - | 4.41 | 74,243 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,411 |
| History of The Netherlands | 0 | - | 4.46 | 17,303 |
| World Leaders Quiz #2 | 0 | - | 4.00 | 35,639 |
| UN Secretaries-General | 0 | - | 4.40 | 7,756 |
| Benevolent Dictators and Enlightened Despots | 0 | - | 4.01 | 19,535 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,751 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,762 |
| All Modern-Day Countries Ever Controlled by Turkic People | 0 | - | 4.95 | 40,664 |
| All Modern-Day Countries Ever Controlled by Arab People with a Map | 0 | - | 4.98 | 54,829 |
| Books by Country Quiz | 0 | - | 4.30 | 32,172 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 284,660 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 267,911 |
| Countries with NO Military | 0 | - | 4.97 | 61,111 |
| Countries with the Most Elite Universities | 0 | - | 4.94 | 146,648 |
| NATO Countries | 0 | - | 4.98 | 275,362 |
| EU Countries Quiz | 0 | - | 4.99 | 269,629 |
| Top Five Countries by Religion | 0 | - | 4.93 | 168,894 |
| 7 Deadly Sins | 0 | - | 4.88 | 394,489 |
| Books of the Protestant Bible | 0 | - | 4.89 | 206,977 |
| Majority Muslim Countries | 0 | - | 4.98 | 368,184 |
| Former Flags | 0 | - | 4.97 | 106,573 |
| Years in History by Picture | 0 | - | 4.44 | 35,065 |
| Historical Events - AD or BC? | 0 | - | 4.70 | 57,159 |
| Materials From History #2 | 0 | - | 4.59 | 30,897 |
| WWII Decoder | 0 | - | 4.41 | 53,015 |
| Name a Valid Answer - World War II | 0 | - | 4.53 | 54,714 |
| Cold War Decoder | 0 | - | 4.83 | 51,896 |
| 20th Century Dates Quiz | 0 | - | 4.56 | 39,304 |
| Events in History #2 | 0 | - | 4.49 | 71,398 |
| Events in History #4 | 0 | - | 4.44 | 44,081 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,312 |
| Infamous Criminals - Mostly U.S. | 0 | - | 4.21 | 48,791 |
| Assassinations in History | 0 | - | 4.20 | 65,928 |
| Famous Seconds | 0 | - | 4.22 | 46,370 |
| Ages and Eras Quiz | 0 | - | 4.38 | 67,424 |
| Celebrity Knights of the United Kingdom | 0 | - | 4.23 | 39,379 |
| Titled People Quiz #1 | 0 | - | 4.10 | 45,591 |
| Titled People Quiz #3 | 0 | - | 4.34 | 43,014 |
| Job Titles Quiz #1 | 0 | - | 4.22 | 75,809 |
| Female Historical Figures | 0 | - | 4.31 | 33,080 |
| Historical Blunders | 0 | - | 4.33 | 91,643 |
| Territorial Accessions | 0 | - | 4.38 | 34,615 |
| People Known as "The Great" | 0 | - | 4.46 | 24,498 |
| This Day in History - July | 0 | - | 4.49 | 36,362 |
| This Day in History - August | 0 | - | 4.42 | 43,237 |
| This Day in History - September | 0 | - | 4.55 | 57,244 |
| This Day in History - October | 0 | - | 4.49 | 37,546 |
| This Day in History - January | 0 | - | 4.53 | 46,561 |
| This Day in History - March | 0 | - | 4.45 | 43,531 |
| Ancient Civilizations | 0 | - | 4.63 | 37,733 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,521 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,649 |
| Roman Names for Places | 0 | - | 4.62 | 57,846 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,412 |
| The Places They Went #1 | 0 | - | 4.74 | 33,437 |
| Famous Inventors | 0 | - | 4.43 | 43,443 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,433 |
| European History for Dummies | 0 | - | 4.82 | 89,256 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,266 |
| 40 Historical People that Everyone Should Know | 0 | - | 4.09 | 1,010,282 |
| Countries with the Most Tanks | 0 | - | 4.91 | 106,185 |
| Coldest World Capitals | 0 | - | 4.95 | 133,010 |
| World Currency Quiz | 0 | - | 4.92 | 298,045 |
| Countries with the Most Billionaires | 0 | - | 4.90 | 332,634 |
| Countries with the Most Millionaires | 0 | - | 4.86 | 121,942 |
| Biggest Export Partners For Every Country | 0 | - | 4.98 | 49,671 |
| Top Oil Reserve Countries | 0 | - | 4.93 | 74,069 |
| Cities with the Biggest Economies | 0 | - | 4.91 | 129,574 |
| Countries with the Most Christians | 0 | - | 4.92 | 141,336 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 86,850 |
| Buddhist Countries | 0 | - | 4.96 | 142,871 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,090,135 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 316,728 |
| The 2nd Millennium BC | 0 | - | 4.64 | 20,682 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,018 |
| History Analogies #1 | 0 | - | 4.53 | 89,758 |
| History Analogies #2 | 0 | - | 4.49 | 76,976 |
| Current Events by Year, 1990–2009 | 0 | - | 4.77 | 152,084 |
| Current Events by Year, 1970–1989 | 0 | - | 4.56 | 64,934 |
| Current Events by Year, 1930–1949 | 0 | - | 4.48 | 51,916 |
| History Analogies #3 | 0 | - | 4.61 | 80,412 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,113 |
| Which Came First? | 0 | - | 4.37 | 74,374 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,978 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,497 |
| Random History by Country | 0 | - | 4.53 | 34,644 |
| Valid Answer - World History #1 | 0 | - | 4.56 | 61,513 |
| Animals in World History | 0 | - | 4.74 | 44,199 |
| People - Real or Fictional? | 0 | - | 4.56 | 58,436 |
| Places - Real or Fictional? | 0 | - | 4.59 | 49,338 |
| History True or False #3 | 0 | - | 4.43 | 55,883 |
| World Leaders of the World Wars | 0 | - | 4.35 | 37,641 |
| World Leaders of the Cold War | 0 | - | 4.27 | 25,111 |
| Five Most Guessed World Leaders by Country | 0 | - | 4.18 | 47,176 |
| The Dictator Files: Adolf Hitler | 0 | - | 4.79 | 77,269 |
| A to Z: Legendary Creatures | 0 | - | 4.26 | 52,713 |
| WWII First Names | 0 | - | 4.44 | 41,541 |
| WWII for Dummies | 0 | - | 4.80 | 103,743 |
| Cold War Trivia #1 | 0 | - | 4.41 | 56,913 |
| Events in History #3 | 0 | - | 4.40 | 71,424 |
| Events in History #1 | 0 | - | 4.34 | 157,221 |
| Events in Ancient History | 0 | - | 4.50 | 35,683 |
| People Who Died Young #1 | 0 | - | 4.24 | 63,520 |
| Deaths by Date and Cause #1 | 0 | - | 4.37 | 94,865 |
| Deaths by Date and Cause #2 | 0 | - | 4.15 | 67,453 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 73,507 |
| Countries That Were Invaded | 0 | - | 4.54 | 96,879 |
| Political Quotes | 0 | - | 4.17 | 19,800 |
| This Day in History - April | 0 | - | 4.40 | 44,383 |
| This Day in History - May | 0 | - | 4.33 | 48,239 |
| This Day in History - June | 0 | - | 4.36 | 33,426 |
| This Day in History - November | 0 | - | 4.24 | 33,528 |
| This Day in History - December | 0 | - | 4.32 | 40,443 |
| This Day in History - February | 0 | - | 4.38 | 39,693 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,109 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,416 |
| The 19th Century | 0 | - | 4.53 | 67,861 |
| The 18th Century | 0 | - | 4.52 | 53,105 |
| The 16th Century | 0 | - | 4.77 | 58,723 |
| The 9th and 10th Century | 0 | - | 4.54 | 37,527 |
| The 21st Century | 0 | - | 4.48 | 105,248 |
| Battle to Country | 0 | - | 4.91 | 52,467 |
| The Life of King David | 0 | - | 4.37 | 14,056 |
| History Multiple Choice #1 | 0 | - | 4.46 | 81,486 |
| Years in History #2 - Multiple Choice | 0 | - | 4.43 | 41,393 |
| History Multiple Choice #2 | 0 | - | 4.43 | 49,782 |
| History Multiple Choice #3 | 0 | - | 4.45 | 48,522 |
| History Multiple Choice #5 | 0 | - | 4.49 | 32,253 |
| Three Real and One Fake - World History | 0 | - | 4.44 | 38,174 |
| English Royal Consorts | 0 | - | 4.37 | 37,149 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,594 |
| British History A-Z #1 | 0 | - | 4.45 | 45,775 |
| Kings of France Quiz | 0 | - | 4.20 | 32,545 |
| Dark Ages History | 0 | - | 4.42 | 32,671 |
| 30 Historical People You Probably Don't Know | 0 | - | 4.36 | 60,767 |
| Name that Historical Figure #1 | 0 | - | 4.63 | 335,328 |
| World Capitals in the Answer | 0 | - | 4.94 | 76,244 |
| Monarchies of Europe | 0 | - | 4.90 | 97,249 |
| Monarchies of Asia | 0 | - | 4.97 | 70,557 |
| Capital Cities with the Least Precipitation | 0 | - | 4.89 | 29,017 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 193,802 |
| Countries with the Most Exports | 0 | - | 4.96 | 154,070 |
| Top Crude Oil Producing Countries | 0 | - | 4.89 | 188,398 |
| Countries by Oil Consumption | 0 | - | 4.96 | 119,493 |
| Richest Island Countries | 0 | - | 4.84 | 99,437 |
| Largest Economies in 2050 | 0 | - | 4.90 | 110,585 |
| Capitals of Countries with the Biggest Economies | 0 | - | 4.93 | 94,668 |
| Richest Countries by Per-Capita GDP | 0 | - | 4.96 | 261,871 |
| Countries With Highest GDP as a Percent of Continent | 0 | - | 4.95 | 102,863 |
| Countries with the Highest GDP per Square Kilometer | 0 | - | 4.90 | 83,652 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,234 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 110,523 |
| Countries with the Most Catholics | 0 | - | 4.90 | 107,923 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,151 |
| Orthodox Countries | 0 | - | 4.91 | 130,300 |
| Countries with the Most Muslims | 0 | - | 4.95 | 159,198 |
| The Sun Quiz | 0 | - | 4.93 | 34,058 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,573 |
| Capital Cities by Cartoon Riddles | 0 | - | 4.98 | 86,598 |
| Divided World City Name Puzzle #1 | 0 | - | 4.88 | 48,067 |
| Divided World City Name Puzzle #2 | 0 | - | 4.83 | 36,447 |
