John McMahon
John McMahon has written at least 3 books. Their most popular book is The Good Detective with 3 saves with an average rating of -⭐.
Authorship percentage indicates primary author status - excluding introductions, forewards and other contributions.
Series
3 primary booksAuthored 100% of series
Detective P. T. Marsh
Detective P. T. Marsh is a 3-book series with 3 released primary works first released in 2019 with contributions by John McMahon.
