I have seen a lot of criticism of the book online about how Jared Diamond cherry picks evidence for his hypothesis about how civilization was more an adaptation than a choice. When I read an overview I thought it had some merit regarding success of civilization. But is it worth reading as many historians consider it a bad hypothesis? If so, any better books?
There are some notes concerning Diamond's work in the FAQ: Historians' views of Jared Diamond's "Guns, Germs, and Steel"
And from that, here's a post on other relevant works.
I'd argue that it's a fun read, but don't be credulous about it, and use it as a good stepping off point for reading all the criticism of it that presents good counter-arguments to it. Think of it as the seed of a pearl.