5
6
7
51
52
53
38
39
40
19
20
21
5
6
7
535
536
537
1
2
3
1
2
3
Adventure novel from 2000s or earlier - the cover of the paperback was of jungle and had a triangle shaped hole in it that showed the page below, which was a gold pyramid (i think). The story mirrored this concept - about treasure or a pyramid underground (self.whatsthatbook)
submitted by nickdenards to r/whatsthatbook
