Have ww 2 items discovered at a thrift store?

I was at a salvation army and came across some interesting items...The box contained a photo album with 50 plus very high quality photo's..Letters from a decorated pilot to his family approx 300 to 500 letters all in order from 1943 till early 1946...Flight plans bombing instructions original training manuals magazines that the military published..letters from a usaf major discussing losses in battles etc...More than enough to write a book on this guy's life and like i said the photo's are simply amazing more than likely never been made public...My jaw hit the floor when i seen what was in this collection ...I need help to see if there is any value to these items and how to go about getting it all appraised any help please contact me at htjude@hotmail.com Thanks