By Hook Or By Crook: How Cults Lure Christians, Harold L. Bussell, 1993 [originally published as Unholy Devotion: Why Cults Lure Christians].
Dr. Bussell’s perspective is that evangelicals are seldom attracted to aberrational Christian groups because of their doctrine; rather, the appeal is the promise of “something more”, a perceived “spirituality”.
Burroughs Gospel Worship 14 chapters (263 pages) which are each a sermon on how to properly worship God. (format PDF)
“Jeremiah Burroughs’ Gospel Worship has greatly influenced my understanding of biblical worship. It is one of the most important books I have ever read.”
–R.C. Sproul
Download: Burroughs Gospel Worship.