Nikola Tesla was a brilliant inventor of the Industrial Revolution, but as a child, he struggled with illnesses. When sick, Tesla found comfort in stories by Mark Twain. As an adult, Tesla became friends with the man behind this pen name, Samuel Clemens, who was captivated by Tesla's unique inventions. This book unveils details behind this interesting friendship, with approachable text and enlightening historical images. Fascinating fact boxes and primary sources enhance this biography, which aligns with social studies curricula. This volume leaves readers with a lasting appreciation for these historical figures and the power of friendship.