Dr. Martin Luther King, Jr., was only 25 when he helped organize the Montgomery bus boycott and was soon organizing black people across the country in support of the right to vote, desegregation, and other basic civil rights. Maintaining nonviolent and peaceful tactics even when his life was threatened, King was also an advocate for the poor and spoke out against racial and economic injustice until his death - from an assassin's bullet - in 1968. 

Jane Goodall, born in London, England, always loved animals and wanted to study them in their natural habitats. So at age 26, off she went to Africa! Goodall's up-close observations of chimpanzees changed what we know about them and paved the way for many female scientists who came after her. Now her story comes to life in this biography.

Everyone has heard of Albert Einstein - but what exactly did he do? How much do kids really know about Albert Einstein besides the funny hair and genius label? For instance, do they know that he was expelled from school as a kid? Finally, here's the story of Albert Einstein's life, told in a fun, engaging way that clearly explores the world he lived in and changed. 

Celebrated for her courageous exploits as a conductor on the Underground Railroad, Harriet Tubman has entered history as one of 19th-century America's most enduring and important figures. But just who was this remarkable woman?

Born in Warsaw, Poland, on November 7, 1867, Marie Curie was forbidden to attend the male-only University of Warsaw, so she enrolled at the Sorbonne in Paris to study physics and mathematics. There she met a professor named Pierre Curie, and the two soon married, forming one of the most famous scientific partnerships in history. Together, they discovered two elements and won a Nobel Prize in 1903. (Later, Marie won another Nobel award for chemistry in 1911.)

In her amazing diary, Anne Frank revealed the challenges and dreams common for any young girl. But Hitler brought her childhood to an end and forced her and her family into hiding. Who Was Anne Frank? looks closely at Anne’s life before the secret annex, what life was like in hiding, and the legacy of her diary.

Mohandas Karamchand Gandhi was born in 1869 in British-occupied India. Though he studied law in London and spent his early adulthood in South Africa, he remained devoted to his homeland and spent the later part of his life working to make India an independent nation. Calling for non-violent civil disobedience, Gandhi led India to independence and inspired movements for civil rights around the world. Gandhi is recognized internationally as a symbol of hope, peace, and freedom. 

Sacagawea was only 16 when she made one of the most remarkable journeys in American history, traveling 4,500 miles by foot, canoe, and horse - all while carrying a baby on her back! Without her, the Lewis and Clark expedition might have failed.  

At age two, Helen Keller became deaf and blind. She lived in a world of silence and darkness and she spent the rest of her life struggling to break through it. But with the help of teacher Annie Sullivan, Helen learned to read, write, and do many amazing things. This inspiring biography is perfect for young middle-grade listeners. 

Leonardo da Vinci was a gifted painter, talented musician, and dedicated scientist and inventor, designing flying machines, submarines, and even helicopters. Yet he had a hard time finishing things, a problem anyone can relate to. Only 13 paintings are known to be his; as for the illustrated encyclopedia he intended to create, all that he left were thousands of disorganized notebook pages.  Here is an accessible portrait of a fascinating man who lived at a fascinating time - Italy during the Renaissance. 

Marco Polo was 17 when he set out for China...and 41 when he came back! More than 700 years ago, Marco Polo traveled from the medieval city of Venice to the fabled kingdom of the great Kublai Khan, seeing new sights and riches that no Westerner had ever before witnessed. But did Marco Polo experience the things he wrote about...or was it all made up? Young listeners are presented with the facts in this entertaining Who Was...? biography. 

The Earth is definitely getting warmer. There's no argument about that, but who, or what, is the cause? While the vast majority of scientists who study the environment agree that humans play a large part in climate change, there is a counterargument. Author Gail Herman presents both sides of the debate in this fact-based, fair-minded, and well-researched book that looks at the subject from many perspectives, including scientific, social, and political. 

A thoughtful and age-appropriate introduction to an unimaginable event. The Holocaust was a genocide on a scale never before seen, with as many as twelve million people killed in Nazi death camps - six million of them Jews. Gail Herman traces the rise of Hitler and the Nazis, whose rabid anti-Semitism led first to humiliating anti-Jewish laws, then to ghettos all over Eastern Europe, and ultimately to the Final Solution. She presents just enough information for an elementary-school audience in a well-researched book that covers one of the most horrible events in history.  

Isaac Newton was always a loner, preferring to spend his time contemplating the mysteries of the universe. When the plague broke out in London in 1665 he was forced to return home from college. It was during this period of so much death that Newton gave life to some of the most important theories in modern science, including gravity and the laws of motion. 

Cassius Marcellus Clay, Jr., won the world heavyweight championship at the age of 22, the same year he joined the Nation of Islam and changed his name to Muhammad Ali. He would go on to become the first and only three-time (in succession) world heavyweight champion. Nicknamed "The Greatest", Ali was as well known for his unique boxing style, consisting of the Ali Shuffle and the rope-a-dope, as he was for the catchphrase "float like a butterfly, sting like a bee".