11 books • 4 series
Where Is the Tower of London? (Where Is?)
What Was the Wild West? (What Was...?)
What Was the Hindenburg? (What Was...?)
Who Was Isaac Newton? (Who Was?)
What Is the Panama Canal? (What Was...?)
Who Was Maurice Sendak? (Who Was?)
Quien Fue Abraham Lincoln? (Who Was Abraham Lincoln?) (Quien Fue...?)
Who Was Dr. Seuss? (Who Was?)
Who Was Abraham Lincoln? (Who Was?)
Jacob Riis
Arthur Conan Doyle
