I STILL think the best book ever written about the whole Roswell thing is: Carey, Thomas, and Donald R. Schmitt, ‘Witness to Roswell’. If you’re even the slightest bit interested in the event, this is THE book to read.
And it’s sufficiently well-written that it’ll appeal also to those who aren’t too terribly interested in such things, but are simply looking for a “good read” for the summer hammock, the airport waiting lounge or the flight, or the beach. It’s a lot of fun, by any standard.