I've been enjoying this book, which is very clearly written until we get deep into physics near the end (and even then it's more that the subject matter is inherently difficult for those of us who are not physicists ... or even scientists).
However, it wanders far from Einstein's actual views to explore the pros and cons of various theological implications of relativity theory. If you're more interested in getting straight what Einstein may have thought, you could do better to read his original writings, although the first half of this book makes a nice supplement. Two things that are absolutely clear are: (1) Einstein did not believe in (and forcefully denied the existence of) a personal God; and (2) Einstein did not believe in personal immortality. He was at some pains to explain the former (and copped much flak for it).
The only real isssue is whether Einstein believed in some kind of transcendent impersonal force that could be called "God" in some sense or whether he was always speaking purely metaphorically when he spoke (as he often did) of "God". Just when you think you that clear and settled in your mind, you can come across a passage that makes you wonder. But he certainly did not believe in a God or gods as we ordinarily think of them: as things with feelings and personality. He denied the existence of anything like that, and did so in straightforward and pretty strong terms.