| Countries by Number of Books Published | 0 | - | 4.95 | 72,313 |
| Top Five Countries by Religion | 0 | - | 4.93 | 170,451 |
| Majority Muslim Countries | 0 | - | 4.98 | 372,595 |
| Countries with the Most Christians | 0 | - | 4.92 | 142,573 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 87,726 |
| Buddhist Countries | 0 | - | 4.96 | 143,571 |
| "Second Best" History Edition | 0 | - | 4.94 | 62,647 |
| Military History Vocabulary | 0 | - | 4.91 | 66,959 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 111,311 |
| Countries with the Most Catholics | 0 | - | 4.90 | 108,898 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,761 |
| Orthodox Countries | 0 | - | 4.92 | 131,134 |
| Countries with the Most Muslims | 0 | - | 4.95 | 159,986 |
| G7 Leaders Since 2003 | 0 | - | 4.48 | 46,328 |
| Former Countries by Territory Map | 0 | - | 4.96 | 102,396 |
| Empires by Maps | 0 | - | 4.98 | 119,747 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,538 |
| WWII Geography | 0 | - | 4.81 | 120,023 |
| WWII Figures by Picture | 0 | - | 4.89 | 64,819 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,290 |
| Name the English Monarchs | 0 | - | 4.91 | 500,884 |
| Famous Dictators #1 | 0 | - | 4.69 | 199,351 |
| Countries with the Most Cathedrals | 0 | - | 4.51 | 44,885 |
| Sharia Law Countries | 0 | - | 4.48 | 63,549 |
| Historical Leaders by Date #1 | 0 | - | 4.48 | 31,326 |
| Historical Leaders by Date #2 | 0 | - | 4.55 | 30,156 |
| Historical Rulers #2 | 0 | - | 4.26 | 47,351 |
| Historical Rulers #1 | 0 | - | 4.35 | 118,725 |
| World Leaders Quiz #1 | 0 | - | 4.11 | 109,878 |
| The Life of King David | 0 | - | 4.37 | 14,106 |
| Authors by Picture | 0 | - | 4.48 | 25,494 |
| Influential Women in History | 0 | - | 4.42 | 35,441 |
| Metals of Antiquity | 0 | - | 4.94 | 93,229 |
| Cradles of Civilization | 0 | - | 4.46 | 39,502 |
| Materials From History #1 | 0 | - | 4.56 | 51,420 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,524 |
| Historical Countries by Ruler | 0 | - | 4.48 | 48,486 |
| History: What Came First? #1 | 0 | - | 4.87 | 104,977 |
| Words for Leaders | 0 | - | 4.77 | 256,542 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 706,268 |
| Biggest Nations and Empires Ever | 0 | - | 4.52 | 145,651 |
| Famous Explorers | 0 | - | 4.58 | 36,102 |
| Famous Empires by Description | 0 | - | 4.73 | 118,271 |
| Answers by Time Period | 0 | - | 4.64 | 55,478 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 70,128 |
| Catholic Countries | 0 | - | 4.78 | 214,256 |
| Top 10 Most Islamic European Countries | 0 | - | 4.75 | 160,654 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,827 |
| Popular Royal Names | 0 | - | 4.27 | 124,797 |
| World Leaders Quiz #2 | 0 | - | 4.00 | 35,781 |
| UN Secretaries-General | 0 | - | 4.40 | 7,781 |
| Benevolent Dictators and Enlightened Despots | 0 | - | 4.01 | 19,586 |
| Famous Dictators #2 | 0 | - | 4.31 | 87,331 |
| First Names of Painters | 0 | - | 4.43 | 59,777 |
| All Modern-Day Countries Ever Controlled by Turkic People | 0 | - | 4.94 | 40,914 |
| All Modern-Day Countries Ever Controlled by Arab People with a Map | 0 | - | 4.98 | 55,179 |
| Books with Animals in the Title #1 | 0 | - | 4.41 | 74,497 |
| A Quiz About Islam | 0 | - | 4.31 | 48,364 |
| Cities by Place of Worship - Picture Quiz | 0 | - | 4.40 | 30,967 |
| Books of the Protestant Bible | 0 | - | 4.89 | 209,103 |
| Biblical Geography | 0 | - | 4.40 | 67,113 |
| Countries That Don't Recognize Israel | 0 | - | 4.67 | 34,710 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 286,979 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 271,222 |
| Countries with NO Military | 0 | - | 4.97 | 61,810 |
| Countries with the Most Elite Universities | 0 | - | 4.94 | 147,755 |
| NATO Countries | 0 | - | 4.98 | 278,774 |
| EU Countries Quiz | 0 | - | 4.99 | 272,357 |
| Years in History by Picture | 0 | - | 4.44 | 35,397 |
| History of The Netherlands | 0 | - | 4.46 | 17,388 |
| Historical Events - AD or BC? | 0 | - | 4.70 | 57,477 |
| Materials From History #2 | 0 | - | 4.59 | 31,435 |
| 20th Century Dates Quiz | 0 | - | 4.56 | 39,377 |
| Events in History #2 | 0 | - | 4.49 | 71,605 |
| Events in History #4 | 0 | - | 4.44 | 44,238 |
| Infamous Criminals - Mostly U.S. | 0 | - | 4.21 | 48,937 |
| Assassinations in History | 0 | - | 4.21 | 66,129 |
| Famous Seconds | 0 | - | 4.22 | 46,529 |
| Ages and Eras | 0 | - | 4.39 | 67,618 |
| Celebrity Knights of the United Kingdom | 0 | - | 4.23 | 39,463 |
| Titled People Quiz #1 | 0 | - | 4.11 | 45,748 |
| Titled People Quiz #3 | 0 | - | 4.34 | 43,133 |
| Job Titles Quiz #1 | 0 | - | 4.22 | 75,938 |
| Female Historical Figures | 0 | - | 4.28 | 33,209 |
| Historical Blunders | 0 | - | 4.34 | 91,858 |
| Territorial Accessions | 0 | - | 4.36 | 34,741 |
| People Known as "The Great" | 0 | - | 4.46 | 24,616 |
| This Day in History - July | 0 | - | 4.49 | 36,428 |
| This Day in History - August | 0 | - | 4.42 | 43,327 |
| This Day in History - September | 0 | - | 4.55 | 57,379 |
| This Day in History - October | 0 | - | 4.49 | 37,597 |
| This Day in History - January | 0 | - | 4.50 | 46,663 |
| This Day in History - March | 0 | - | 4.45 | 43,619 |
| Ancient Civilizations | 0 | - | 4.64 | 37,883 |
| The Places They Went #1 | 0 | - | 4.74 | 33,499 |
| Famous Inventors | 0 | - | 4.43 | 43,507 |
| 40 Historical People that Everyone Should Know | 0 | - | 4.09 | 1,012,771 |
| Books by Country Quiz | 0 | - | 4.30 | 32,209 |
| 7 Deadly Sins | 0 | - | 4.88 | 398,462 |
| Former Flags | 0 | - | 4.97 | 107,362 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,831 |
| WWII Decoder | 0 | - | 4.41 | 53,427 |
| Name a Valid Answer - World War II | 0 | - | 4.53 | 55,225 |
| Cold War Decoder | 0 | - | 4.83 | 52,202 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,922 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,754 |
| All Modern-Day Countries Ever Controlled by the Seljuks | 0 | - | 4.92 | 28,431 |
| European History for Dummies | 0 | - | 4.83 | 89,688 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,713 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,536 |
| The Bible by Picture | 0 | - | 4.23 | 20,082 |
| Countries with the Most Tanks | 0 | - | 4.91 | 106,980 |
| Coldest World Capitals | 0 | - | 4.95 | 133,353 |
| World Currency Quiz | 0 | - | 4.91 | 301,309 |
| Countries with the Most Billionaires | 0 | - | 4.90 | 334,329 |
| Countries with the Most Millionaires | 0 | - | 4.86 | 122,989 |
| Biggest Export Partners For Every Country | 0 | - | 4.98 | 50,245 |
| Top Oil Reserve Countries | 0 | - | 4.93 | 74,554 |
| Cities with the Biggest Economies | 0 | - | 4.91 | 130,427 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,094,955 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 319,306 |
| The 2nd Millennium BC | 0 | - | 4.64 | 20,792 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,231 |
| History Analogies #1 | 0 | - | 4.53 | 89,893 |
| History Analogies #2 | 0 | - | 4.49 | 77,135 |
| Current Events by Year, 1990–2009 | 0 | - | 4.77 | 152,431 |
| Current Events by Year, 1970–1989 | 0 | - | 4.56 | 65,094 |
| Current Events by Year, 1930–1949 | 0 | - | 4.48 | 52,031 |
| Groups of Things - History #1 | 0 | - | 4.41 | 93,932 |
| History Analogies #3 | 0 | - | 4.61 | 80,578 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,355 |
| Which Came First? | 0 | - | 4.37 | 74,672 |
| Christopher Columbus Quiz | 0 | - | 4.21 | 8,284 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,101 |
| History of Israel | 0 | - | 3.79 | 11,025 |
| Random History by Country | 0 | - | 4.53 | 34,786 |
| Valid Answer - World History #1 | 0 | - | 4.56 | 61,771 |
| Animals in World History | 0 | - | 4.74 | 44,400 |
| People - Real or Fictional? | 0 | - | 4.56 | 58,701 |
| Places - Real or Fictional? | 0 | - | 4.59 | 49,507 |
| History True or False #3 | 0 | - | 4.43 | 56,697 |
| World Leaders of the Cold War | 0 | - | 4.27 | 25,230 |
| The Dictator Files: Adolf Hitler | 0 | - | 4.79 | 77,708 |
| A to Z: Legendary Creatures | 0 | - | 4.26 | 52,931 |
| WWII First Names | 0 | - | 4.44 | 41,717 |
| WWII for Dummies | 0 | - | 4.79 | 104,594 |
| Cold War Trivia #1 | 0 | - | 4.42 | 57,176 |
| Events in History #3 | 0 | - | 4.40 | 71,604 |
| Events in History #1 | 0 | - | 4.34 | 157,570 |
| Events in Ancient History | 0 | - | 4.50 | 35,891 |
| Born Here on This Date #1 | 0 | - | 3.92 | 35,343 |
| Famous Founders in the U.S. | 0 | - | 3.98 | 33,813 |
| People Who Died Young #1 | 0 | - | 4.24 | 63,627 |
| Titled People Quiz #2 | 0 | - | 4.38 | 26,722 |
| Deaths by Date and Cause #1 | 0 | - | 4.38 | 95,104 |
| Deaths by Date and Cause #2 | 0 | - | 4.15 | 67,664 |
| Job Titles Quiz #2 | 0 | - | 3.62 | 37,302 |
| Famous Ships Quiz | 0 | - | 4.25 | 29,229 |
| Famous Short People | 0 | - | 4.39 | 17,443 |
| Name the Alliance | 0 | - | 4.29 | 29,472 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 73,908 |
| Coups d'Etat - Name the Country | 0 | - | 4.40 | 27,654 |
| Famous Documents | 0 | - | 4.05 | 21,810 |
| Countries That Were Invaded | 0 | - | 4.55 | 97,252 |
| Legendary Deeds | 0 | - | 4.16 | 28,905 |
| Disasters in History | 0 | - | 4.40 | 25,653 |
| The 12 Tribes of Israel | 0 | - | 3.68 | 9,862 |
| Executions in History | 0 | - | 4.29 | 16,952 |
| Political Quotes | 0 | - | 4.17 | 19,860 |
| This Day in History - April | 0 | - | 4.40 | 44,442 |
| This Day in History - May | 0 | - | 4.33 | 48,332 |
| This Day in History - June | 0 | - | 4.32 | 33,485 |
| This Day in History - November | 0 | - | 4.24 | 33,586 |
| This Day in History - December | 0 | - | 4.32 | 40,512 |
| This Day in History - February | 0 | - | 4.38 | 39,756 |
| The 19th Century | 0 | - | 4.53 | 68,047 |
| The 18th Century | 0 | - | 4.52 | 53,239 |
| The 16th Century | 0 | - | 4.77 | 58,838 |
| The 9th and 10th Century | 0 | - | 4.54 | 37,629 |
| The 21st Century | 0 | - | 4.48 | 105,747 |
| Battle to Country | 0 | - | 4.91 | 53,050 |
| History Multiple Choice #1 | 0 | - | 4.46 | 81,801 |
| Years in History #2 - Multiple Choice | 0 | - | 4.43 | 41,583 |
| History Multiple Choice #2 | 0 | - | 4.43 | 49,965 |
| History Multiple Choice #3 | 0 | - | 4.45 | 48,679 |
| History Multiple Choice #5 | 0 | - | 4.49 | 32,403 |
| Three Real and One Fake - World History | 0 | - | 4.44 | 38,321 |
| British History A-Z #1 | 0 | - | 4.45 | 46,355 |
| Dark Ages History | 0 | - | 4.42 | 32,727 |
| 30 Historical People You Probably Don't Know | 0 | - | 4.36 | 60,935 |
| Name that Historical Figure #1 | 0 | - | 4.63 | 336,836 |
| Countries Mentioned in the Bible | 0 | - | 4.96 | 66,691 |
| World Capitals in the Answer | 0 | - | 4.94 | 76,746 |
| Monarchies of Europe | 0 | - | 4.90 | 97,833 |
| Monarchies of Asia | 0 | - | 4.97 | 70,910 |
| Capital Cities with the Least Precipitation | 0 | - | 4.89 | 29,121 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 194,707 |
| Countries with the Most Exports | 0 | - | 4.96 | 154,929 |
| Top Crude Oil Producing Countries | 0 | - | 4.89 | 189,228 |
| Countries by Oil Consumption | 0 | - | 4.96 | 119,904 |
