I recently stumbled across a very informative book in my local library.

Title: Trace Your Roots with DNA (Using Genetic Tests to Explore Your Family Tree)

Author: Megan Smolenyak Smolenyak and Ann Turner.

This book addresses many of the questions on this post. Some of the Content Headings are: The Fundamentals, Testing Options Explained(Y-Chromosome, MtDNA) Also explains Haplogroups.

Hope someone finds this useful.