Hi Jewelgal,
I have a book I really like but it doesn't have any pics. It is more for how to pick out a ring and diamond and tricks for buying one. It helped me but I love every ring I see! It's called 101 Tips on Selecting Your Engagement Ring. Here is the Link:
I love the diamond ring on the cover - it's a cute cover that caught my eye and the book was fun to read too, but I am also interested in other books that go deep into diamonds because I find it interesting. Hopefully there will be some suggestions.