Here is a great instructional on how to apply a prosthetic from http://hauntwiki.com:

http://hauntwiki.com/index.php?title=Apply_a_Prosthetic

This walkthough was provided by Toxic Image Make-Up Studios. For more information about make-up courses or our services please visit Toxic Image
Prosthetics, Makeup & Removers supplied by FX Warehouse Inc. at FX Warehouse
Thanks, Josh and Thea!

Here is a list of some great books to learn from

Techniques of Three-Dimensional Makeup by Lee Baygan

Making a Monster: The Creation of Screen Characters By the Great Makeup Artists                                                                                                                                                                                                                                        by Sue Roy and Al Taylor

Dick Smith's Do-It-Yourself Monster Make-Up Handbook by Dick Smith

The Prop Builders Molding & Casting Handbook by Thurston James

Special Effects Make-Up by Janus Vinther

The Monster Makers Mask Makers Handbook by Arnold Goldman

Stage Makeup by Richard Corson

The Winston Effect: The Art and History of Stan Winston Studio by Jody Duncan

Special Make-Up Effects by Vincent Kehoe

Grande Illusions: Book I and II by Tom Savini

Men, Makeup & Monsters: Hollywood's Masters of Illusion and FX by Anthony Timpone

Theatrical FX Makeup by David Sartor and John Pivovarnick

The Makeup Artist Handbook: Techniques for Film, Television, Photography,
and Theatre
 by Gretchen Davis and Mindy Hall

Complete Make-Up Artist: Working in Film, Fashion, Television and Theatre
by Penny Delamar

Movie Sets 101: The Definitive Survivor's Guide by Paul J. Salamoff

The Official Magazine Star Trek the next generation makeup FX Journal
by Michael Westmore

The Official Splatter Movie Guide by John McCarty

ZBrush Character Creation: Advanced Digital Sculpting by Scott Spencer

The Frankenstein Film Sourcebook: (Bibliographies and Indexes in Popular Culture)
by Caroline Joan ("Kay") S. Picart, Frank Smoot, and Jayne Blodgett

Here is a list of some great instructional videos

By Mark Alfrey
Sculpting Movie Monsters
Sculpting a Human Head
Standard Molds And Casings
Prosthetic Makeup for Beginners
Ultimate Lifecasting
Sculpting The Nude Figure
Sculpting with Water Clay
Standard Molds And Casings

By Michael Burnett
The Art of Special Make-up Effects Vol.1, 2 & 3

By Karl Zundel
The Art of Creating Latex Masks

Here is a list of great websites to learn from

The MonsterMakers: How to Make a Monster!
http://www.monstermakers.com/content/howto.html

Castcraft
http://www.castcraft.com/index.htm

FX Warehouse inc.
http://www.rebelscafe.com/cgi-bin/members/pub9990286304804.cgi?categoryid=9990286305123

S.A.P.S.E.M.A.
http://www.sapsema.org/

The FX Lab
www.theeffectslab.com