Programming Books

23 Excellent Free Books to Learn Perl

Last Updated on October 17, 2023

21. Perl 5 Internals by Simon Cozens

Perl 5 InternalsPerl 5 Internals is a three-hour course which provides a hands-on introduction to how the Perl interpreter works internally

It also explains how to go about testing and fixing bugs in the interpreter, and what the internals are likely to look like in the future of Perl, Perl 6.

You’ll need at least an intermediate level of Perk knowledge, some familiarity with C, and know how to use a compiler.

The book covers:

  • Development Structure.
  • Parts of the Interpreter.
  • Internal Variables.
  • The Lexer and the Parser.
  • Fundamental operations.
  • The Runtime Environment.
  • The Perl Compiler.
  • Hacking Perl.
  • Perl 6 Internals.

This book is also released under the Open Publications License 1.0.

Read the book


22. Picking Up Perl by Bradley M. Kuhn

Picking Up PerlPicking up Perl was primarily written to serve as a freely redistributable tutorial for the Perl language.

Topics covered include:

  • Working with Scalars.
  • Arrays.
  • Control Structures.
  • Associative Arrays (Hashes).
  • Regular Expressions.
  • Subroutines.
  • Background of Perl.

This book is released under the terms of the GNU Free Documentation License, Version 1.1 or any later version.

Read the book


23. Essential Perl by Nick Parlante

Essential PerlEssential Perl provides the reader with a concise introduction to Perl.

The book is targeted at developers with some programming knowledge.

So if you’re new to Perl, look at some of the other books covered in this article.

Chapters include:

  • What is Perl?
  • Variables.
  • Strings.
  • Arrays.
  • Associative Arrays.
  • If, while, etc.
  • File Input.
  • Print output.
  • Strings and Regular Expressions.
  • Subroutines.
  • Running External Programs.

The author doesn’t specify a specific license, but says the document is free to be used, reproduced or sold as long as the copyright notice is maintained.

Read the book


Pages in this article:
Page 1 – Modern Perl and more books
Page 2 – Impatient Perl and more books
Page 3 – The Perl Reference Guide and more books
Page 4 – Perl 6 at a Glance and more books
Page 5 – Perl 5 Internals and more books


All books in this series:

Free Programming Books
AdaALGOL-like programming language, extended from Pascal and other languages
AgdaDependently typed functional language based on intuitionistic Type Theory
ArduinoInexpensive, flexible, open source microcontroller platform
AssemblyAs close to writing machine code without writing in pure hexadecimal
AwkVersatile language designed for pattern scanning and processing language
BashShell and command language; popular both as a shell and a scripting language
BASICBeginner’s All-purpose Symbolic Instruction Code
CGeneral-purpose, procedural, portable, high-level language
C++General-purpose, portable, free-form, multi-paradigm language
C#Combines the power and flexibility of C++ with the simplicity of Visual Basic
ClojureDialect of the Lisp programming language
ClojureScriptCompiler for Clojure that targets JavaScript
COBOLCommon Business-Oriented Language
CoffeeScriptTranscompiles into JavaScript inspired by Ruby, Python and Haskell
CoqDependently typed language similar to Agda, Idris, F* and others
CrystalGeneral-purpose, concurrent, multi-paradigm, object-oriented language
CSSCSS (Cascading Style Sheets) specifies a web page’s appearance
DGeneral-purpose systems programming language with a C-like syntax
DartClient-optimized language for fast apps on multiple platforms
DylanMulti-paradigm language supporting functional and object-oriented coding
ECMAScriptBest known as the language embedded in web browsers
EiffelObject-oriented language designed by Bertrand Meyer
ElixirRelatively new functional language running on the Erlang virtual machine
ErlangGeneral-purpose, concurrent, declarative, functional language
F#Uses functional, imperative, and object-oriented programming methods
FactorDynamic stack-based programming language
ForthImperative stack-based programming language
FortranThe first high-level language, using the first compiler
GoCompiled, statically typed programming language
GroovyPowerful, optionally typed and dynamic language
HaskellStandardized, general-purpose, polymorphically, statically typed language
HTMLHyperText Markup Language
IconWide variety of features for processing and presenting symbolic data
JArray programming language based primarily on APL
JavaGeneral-purpose, concurrent, class-based, object-oriented, high-level language
JavaScriptInterpreted, prototype-based, scripting language
JuliaHigh-level, high-performance language for technical computing
KotlinMore modern version of Java
LabVIEWDesigned to enable domain experts to build power systems quickly
LaTeXProfessional document preparation system and document markup language
LispUnique features - excellent to study programming constructs
LogoDialect of Lisp that features interactivity, modularity, extensibility
LuaDesigned as an embeddable scripting language
MarkdownPlain text formatting syntax designed to be easy-to-read and easy-to-write
Objective-CObject-oriented language that adds Smalltalk-style messaging to C
OCamlThe main implementation of the Caml language
PascalImperative and procedural language designed in the late 1960s
PerlHigh-level, general-purpose, interpreted, scripting, dynamic language
PHPPHP has been at the helm of the web for many years
PostScriptInterpreted, stack-based and Turing complete language
PrologA general purpose, declarative, logic programming language
PureScriptSmall strongly, statically typed language compiling to JavaScript
PythonGeneral-purpose, structured, powerful language
QMLHierarchical declarative language for user interface layout - JSON-like syntax
RDe facto standard among statisticians and data analysts
RacketGeneral-purpose, object-oriented, multi-paradigm, functional language
RakuMember of the Perl family of programming languages
RubyGeneral purpose, scripting, structured, flexible, fully object-oriented language
RustIdeal for systems, embedded, and other performance critical code
ScalaModern, object-functional, multi-paradigm, Java-based language
SchemeA general-purpose, functional language descended from Lisp and Algol
ScratchVisual programming language designed for 8-16 year-old children
SQLAccess and manipulate data held in a relational database management system
Standard MLGeneral-purpose functional language characterized as "Lisp with types"
SwiftPowerful and intuitive general-purpose programming language
TclDynamic language based on concepts of Lisp, C, and Unix shells
TeXMarkup and programming language - create professional quality typeset text
TypeScriptStrict syntactical superset of JavaScript adding optional static typing
ValaObject-oriented language, syntactically similar to C#
VHDLHardware description language used in electronic design automation
VimLPowerful scripting language of the Vim editor
XMLRules for defining semantic tags describing structure ad meaning
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