Learning Pearl - making easy and hard things possible (3. ed.). - Randal L. Schwartz; Tom Phoenix (O'Reilly, 2001)

Learning Perl objects, references, and modules - beyond the basics of learning Perl. - Randal L. Schwartz; Tom Phoenix (O'Reilly, 2003)

Learning Perl - making easy things easy and hard things possible (4. ed.). - Randal L. Schwartz; Tom Phoenix; Brian D. Foy (O'Reilly, 2005)

Intermediate Perl - beyond the basics of learning Perl. - Randal L. Schwartz; Brian D. Foy; Tom Phoenix (O'Reilly, 2006)

Learning Perl - making easy things easy and hard things possible: covers Perl 5.10 (5. ed.). - Randal L. Schwartz; Tom Phoenix; Brian D. Foy (O'Reilly, 2008)

Learning Perl - Making Easy Things Easy and Hard Things Possible: Covers Perl 5.14 (6th ed.). - Randal L. Schwartz; Brian D. Foy; Tom Phoenix (O'Reilly, 2011)

Intermediate Perl - Beyond the Basics of Learning Perl: Covers Perl 5.14 (2. ed.). - Randal L. Schwartz; Brian D. Foy; Tom Phoenix (O'Reilly, 2012)