At Borders I think these are going to be the best you'll find as far as E-body info. You aren't going to find a '70 Service manual there or anything.
A couple other authors are Genat and Mueller, but I don't think they go into as much detail as the other 2 books above. You might be hard pressed to find either one there but you never know what you might find.
Around Thanksgiving I was in a Chicago Borders that was closing (I think it was Borders.
) and I found a real ice Ferrari buyers guide from the Ferrari Life forum. Real nice for the "cheap Ferraris", like $20k-$60k versions. Never saw it before but it was at Borders.