If you enjoy the Einstein book, I'd strongly recommend the two autobiographies of Richard Feynman:
Surely You Must Be Joking Mr. Feynman
and
What Do You Care What Other People Think
IMO, Feynman was the equal of Einstein as a physicist (though he wouldn't say so about himself) and contributed greatly to the field of quantum electro dynamics. His autobiographies are amazing insights into a brilliant and unconventional mind.