I have had a couple of router books that can be bought at places like HD, all of which have sections on different ways of mortising. The one that's lying on my floor right now is the Complete Illustrated Guide to Routers, by Lonnie Bird.
I'm not slow, I'm pacing myself!
Isaiah 44:13 Another shapes wood, he extends a measuring line, he outlines it with red chalk. He works it with planes and outlines it with a compass...
Usual kit: Table saw, band saw, dual base router and table, lathe, various saws, planer, sanders, and a multitude of hand tools.