Actually one of the problems I find in science books is that there is a real lack of what you might call mid range books.
There are millions of pop science books like this and they all seem to go - relativity science of the very big, quantum mechanics, science of the very small. Theory of everything required to unite them and the 4 fundamental forces.. yah de yah.
After you've read about 10 of 20 of them and seen similar on TV you want to start throwing things because they all stop at the same place.
There's a real lack of books aimed at say science graduates from other fields who can handle a bit of maths to understand a bit deeper about these things but can't wade through the mountain of research papers.
I can think of a few like Roger Penrose's "Road to reality " but they're really thin on the ground.
Just not a big enough market I guess