42 books in series

What was...?

What was...? is a 28-book series first released in 2013 with contributions by Sarah Fabiny, Who Hq, and 26 others.

What Are Castles and Knights?
What Are Castles and Knights?

1 Reader

Cover 7

What Are the Paralympic Games?

What Are the Paralympic Games?

1 Reader

What Are the Summer Olympics?
What Are the Summer Olympics?

2016 • 1 Reader

What Are the Winter Olympics?
What Are the Winter Olympics?

2021 • 1 Reader

What Is Climate Change?
What Is Climate Change?

1 Reader

What Is Congress?
What Is Congress?

2021 • 1 Reader

Cover 3

What Is NASA?

What Is NASA?

2019 • 1 Reader

What Is Rock and Roll?
What Is Rock and Roll?

2017 • 2 Readers • 129 pages • 5

What Is a Presidential Election?: 2024 Edition
What Is a Presidential Election?: 2024 Edition

2024 • 1 Reader • 113 pages

What Is the Civil Rights Movement?
What Is the Civil Rights Movement?

1 Reader

What Is the Panama Canal?
What Is the Panama Canal?

2014 • 1 Reader

What Is the Statue of Liberty?
What Is the Statue of Liberty?
ByJoan Holub,Who Hq,+1 more

2014 • 1 Reader

What Is the Women's Rights Movement?
What Is the Women's Rights Movement?

2018 • 2 Readers • 112 pages • 4.5

What Is the Women's World Cup?
What Is the Women's World Cup?

1 Reader

What Was D-Day?
What Was D-Day?

2015 • 2 Readers • 114 pages

What Was Ellis Island?
What Was Ellis Island?

2014 • 1 Reader

What Was Pearl Harbor?
What Was Pearl Harbor?

2013 • 3 Readers • 5

Cover 6

What Was Pompeii?

What Was Pompeii?

2014 • 2 Readers

What Was Reconstruction?
What Was Reconstruction?

1 Reader

What Was Stonewall?
What Was Stonewall?

2019 • 2 Readers • 112 pages

What Was Woodstock?
What Was Woodstock?
ByJoan Holub,Who Hq,+1 more

2016 • 2 Readers • 129 pages • 5

What Was the Age of Exploration?
What Was the Age of Exploration?

1 Reader

What Was the Age of the Dinosaurs?
What Was the Age of the Dinosaurs?

2017 • 2 Readers • 5

What Was the Alamo?
What Was the Alamo?

2013 • 2 Readers

What Was the Berlin Wall?
What Was the Berlin Wall?

2019 • 2 Readers • 129 pages

Cover 4

What Was the Bombing of Hiroshima?

What Was the Bombing of Hiroshima?

1 Reader

What Was the Boston Tea Party?
What Was the Boston Tea Party?

2013 • 1 Reader

What Was the Children's Blizzard of 1888?
What Was the Children's Blizzard of 1888?

1 Reader

What Was the Donner Party?
What Was the Donner Party?

1 Reader

What Was the Great Chicago Fire?
What Was the Great Chicago Fire?

1 Reader

What Was the Great Depression?
What Was the Great Depression?

2015 • 2 Readers • 112 pages • 5

What Was the Hindenburg?
What Was the Hindenburg?

2013 • 1 Reader

What Was the Lewis and Clark Expedition?
What Was the Lewis and Clark Expedition?

2014 • 1 Reader

What Was the March on Washington?
What Was the March on Washington?

2013 • 2 Readers • 130 pages • 4

What Was the San Francisco Earthquake?
What Was the San Francisco Earthquake?

1 Reader

Cover 2

What Was the Vietnam War?

What Was the Vietnam War?

2 Readers

What Was the Wild West?
What Was the Wild West?

2017 • 2 Readers • 130 pages • 5

Cover 5

What Were the Negro Leagues?

What Were the Negro Leagues?

1 Reader

What Were the Salem Witch Trials?
What Were the Salem Witch Trials?
ByJoan Holub,Who Hq,+1 more

2015 • 2 Readers

What is the constitution?
What is the constitution?

2018 • 1 Reader • 130 pages

What was the Battle of Gettysburg?
What was the Battle of Gettysburg?

2013 • 1 Reader • 130 pages

What was the Holocaust?
What was the Holocaust?

2018 • 1 Reader • 130 pages