Personally I do not have any Paul Lichter books. I tried for some time to get my hands on "EP in concert" but the price was definetely prohibitive. No matter how good a book is, I'm not prepared to spend hundreds of dollars for a second hand book. If it is fairly priced yes, but at such inflated prices (at ebay etc)... I'm not saying this about Paul Lichter books, but many authors release a book in limited edition at a high price. When becoming out of print, the price soars to incredible heights. Any why should I ask? Are the content worth it?
There are many EP books still in stock which tell the EP story in a relatively objective way IMO. As for pictures, I think that whoever was interested in publishing pictures for profit, had 30 years plus to do so and has done so.
Everyone who spent more than 30 seconds in the vicinity of Elvis wants to write a book and tell us how generous the man was, how friends they were, hoe Elvis couldn't live without their presence, and all that same old irrelevant stuff.
So, IMO as regards books, the only one you should spend quite some money on, is "The concert years" by Stein Skar (for text and great pictures). As regards bio - 2 books do it for me, 'Last Train to Memphis' and Careless love' both by Peter Guralnick (The author has no interest to show EP in good or bad light, he is IMO very objective)