This book is really long, and deep. Be prepared! The book gives an excellent history of Einstein all the way from his childhood up until his death. You will read all the classic stories - how he wasn't the greatest student, mostly because he was bored in school. He wanted to study what was of interest to him, not what was in the curriculum.
The accounts of his interpersonal relationships are interesting. He wasn't the unfeeling analytical type that people assume he would be. He had his own struggles with love and family, just as all of us do.
This book is very scientific and reads like a text book in some parts. Be prepared to spend some quiet time reading it in small doses. You will get to know all of the interesting facets of Einstein's personality and realize that is was human, too.