Fans of the  New York Times best-selling series can find out what makes a hero with puzzles, mazes, quizzes, and brain-busting challenges. Based on Brad Meltzer's series about historical figures from Martin Luther King Jr. to Sacagawea, this activity book features favorites from the Ordinary People Change the World series. Learn new facts, test your knowledge, and go head-to-head with history's greatest minds—all with the beautiful and fun art of Christopher Eliopoulos alongside the interactive and challenging activities. Brad Meltzer is the author of the  New York Times  best-selling Ordinary People Change the World series for children, as well as six  New York Times  best-selling thrillers for adults:  The Tenth Justice, Dead Even, The First Counsel, The Millionaires, The Zero Game , and  The Book of Fate . He is also the #1 best-selling author of the critically acclaimed comic books  Identity Crisis  and  Justice League of America , and is the co-creator of the TV series  Jack & Bobby . A graduate of the University of Michigan and Columbia Law School, he currently lives in Florida. To learn more about Brad, please visit him at www.bradmeltzer.com. Christopher Eliopoulos began his illustration career as a letterer for Marvel, and has worked on thousands of comics, including  Franklin Richards: Son of a Genius ,  Pet Avengers , and  Cow Boy , all of which he wrote and illustrated. He is the illustrator of the  New York Times  Bestselling Ordinary People Change the World series of picture book biographies. He lives in New Jersey with his wife and their identical twin sons.