LaTeX (Lah-tech or Lay-tech) is a document preparation system used for the communication and publication of scientific documents. LaTeX is free software and is distributed under the LaTeX Project Public License.
The large number of available LaTeX commands makes it almost impossible for a user to know the syntax of every command. Beginners, and even power users, need a list of commands, with a short description of the syntax of each. This book quickly answers the common questions "What command should I use? What parameters do I need?"
LaTeX is the leading text preparation system for high-quality documents, and is used extensively in the sciences and academia. This is a comprehensive and authoritative guide available to traditional document layout.
This is a comprehensive manual that functions as a standard introduction and complete reference for writing articles and books containing mathematical formulas.
LaTex: Beginner's Guide by 
LaTeX Quick Reference by 
The LaTeX Companion by 
More Math into LaTeX by