I had the book after it was published. The guy on the cover, the late Keith Whitley, trained at Austin Gym (located in north Dallas) where I was working out. Owned by Roland Jehl, it was a fairly heavy duty gym and was open from 1978 - 1999 before he sold the location for a nice profit. Keith was a monster and had already won Mr. California in 1985 (https://avaluer.org/explore/2983913-bodybuilder_keith_whitley_mr_california_bodybuilding_muscle_photo_color) – around seven years before being featured in the Bigger Muscles book.
Keith was also #1 in the AAU Jr. Mr America Tall Class in 1985.
Tall Class
1 Keith Whitley
2 Matt Small
3 David McGee
4 Al Ortiz
5 Keith Shaw
Whitley died at 53 of heart issues.