For over two decades, this comprehensive manual has been the standard introduction and complete reference for writing articles and books containing mathematical formulas. If the reader requires a streamlined approach to learning LaTeX for composing everyday documents, Grätzer’s © 2014 Practical LaTeX may also be a good choice.
In this carefully revised fifth edition, the Short Course has been brought up to date and reflects a modern and practical approach to LaTeX usage. New chapters have been added on illustrations and how to use LaTeX on an iPad.
Key features:

An examplebased, visual approach and a gentle introduction with the Short Course

A detailed exposition of multiline math formulas with a Visual Guide

A unified approach to TeX, LaTeX, and the AMS enhancements

A quick introduction to creating presentations with formulas
From earlier reviews:
Grätzer’s book is a solution.
âEuropean Mathematical Society Newsletter
There are several LaTeX guides, but this one wins hands down for the elegance of its approach and breadth of coverage.
âAmazon.com, Best of 2000, Editor’s choice
A novice reader will be able to learn the most essential features of LaTeX sufficient to begin typesetting papers within a few hours of time… An experienced TeX user, on the other hand, will find a systematic and detailed discussion of LaTeX features.
âReport on Mathematical Physics
A very helpful and useful tool for all scientists and engineers. âReview of Astronomical Tools