Lisp was invented by John McCarthy in 1958 while he was at the Massachusetts Institute of Technology (MIT).
This reference will take you through simple and practical approach while learning LISP Programming language.

Lisp is the second-oldest high-level programming language after Fortran and has changed a great deal since its early days, and a number of dialects have existed over its history. Today, the most widely known general-purpose Lisp dialects are Common Lisp and Scheme.

LISP - Overview
LISP - Environment
LISP - Program Structure
LISP - Basic Syntax
LISP - Data Types
LISP - Macros
LISP - Variables
LISP - Constants
LISP - Operators
LISP - Decisions
LISP - Loops
LISP - Functions
LISP - Predicates
LISP - Numbers
LISP - Characters
LISP - Arrays
LISP - Strings
LISP - Sequences
LISP - Lists
LISP - Symbols
LISP - Vectors
LISP - Set
LISP - Tree
LISP - Hash Table
LISP - Input & Output
LISP - File I/O
LISP - Structures
LISP - Packages
LISP - Error Handling
LISP - CLOS