There are 31 books in Lone Wolf Series.
Lone Wolf is a series of gamebooks created by Joe Dever and initially illustrated (books 1-8) by Gary Chalk. The series began publishing in July 1984 and sold millions of copies worldwide. (source: Wikipedia) Greek: Μοναχικός Λύκος
Other series related to Lone Wolf Series are Самотния вълк , Freeway Warrior , Le Leggende di Lupo Solitario (omnibus) and Combat Heroes .