8 books in series

O'Reilly Pocket Reference

O'Reilly Pocket Reference is a 8-book series with 8 primary works first released in 1998 with contributions by Arnold Robbins, David Flanagan, Johan Vromans, Peter Prinz, Ulla Kirch-Prinz, Tony Stubblebine, and Michael J. Fitzgerald.

Regular expression pocket reference
Ruby Pocket Reference
vi Editor Pocket Reference
JavaScript Pocket Reference
Perl 5 Pocket Reference
Perl Pocket Reference: Programming Tools
C Pocket Reference: C Syntax and Fundamentals
JavaScript Pocket Reference: Activate Your Web Pages