I'm actually wondering what the fountain pens are in the case in front...
One of the books is this one:
https://omegaforums.net/threads/book-omega-sportwatches-by-john-goldberger-on-sale-on-the-bay.24472/
Others are:
"The Master of Omega" - largely irrelevant now that Moonwatch Only has been released
"The Last Man On the Moon" - Gene Cernan, not read it but guessing interesting NASA history
"Omega Watches" - Goldberger, considered a below average book, has had many bad reviews mainly relating to its lack of detail and accuracy.
"Antiquorum's OmegaMania Auction Guide" - The auction later became famous for its rare watches, frankens, redials, and unfathomably high prices, many never to be repeated again.
"A Journey Through Time" - Though there are some redials in it and not everything can be treated as gospel still the most comprehensive book on Omega's entire history and range
"Omega Saga" - Written by Marco Richon, same author as AJTT, never seen it though
MWO & AJTT are probably the pick of the litter.