Question: The former bassist of what influential extreme metal band, also collaborated on the non-fiction book Only Death is Real?
Sentence (from "Only Death Is Real"): Only Death Is Real: An Illustrated History of Hellhammer and Early Celtic Frost 1981–1985 is a non-fiction book written by Tom Gabriel Fischer with collaboration of Martin Eric Ain, published through Bazillion Points on March 30, 2010.
Relevant evidence: Yes