MAKE BELIEVE
Master Member
I think that could also be a replica of the book from the movie:
https://www.flickr.com/photos/da_pa/11115336216/in/album-72157630033248877/
Also does this book appear in the Last Crusade? Because the only screenshot I've found is from Crystal Skull:
https://farm4.static.flickr.com/3813/11115352005_42a64029d8_b.jpg
Yes, I also think it may very well be a replica.
I assumed the prop was from LC once at the exhibition was displayed with Connery's costume.
Good catch with the pic from KCS.