Grant Hayman
Grant Hayman has written at least 1 book. Their most popular book is Antigravity Propulsion with 2 saves with an average rating of -⭐.
Authorship percentage indicates primary author status - excluding introductions, forewards and other contributions.
Series
6 primary books7 released booksAuthored 0% of series
Underground Knowledge
Underground Knowledge is a 7-book series with 7 released primary works first released in 1991 with contributions by James Morcan and Lance Morcan.
#1
#2
#4
#6
#7