LaTeX reference books
- First choice:  
Guide to LATEX: Document Preparation for Beginners
and Advanced Users
(3rd Edition),
by Helmut Kopka, Patrick W. Daly
- Second choice:  
LaTeX: A Document Preparation System
(2nd Edition), by Leslie Lamport, Duane Bibby
- Third choice:  
Math into LaTeX
(3rd Edition), by George Gratzer