Never made a folder, just fixed blades, but knifemaking is knifemaking and there's two ways you can go about it. The first way to read books by the experts or look at a video. The second is to buy a locking liner kit and put it together. Gives you some idea of all the parts involved and how they go together. I have to confess I never read a book on making fixed blades, just learned the hard way from scratch; but fixed blades don't have all those itty bitty little parts that have to be stuck inside and work together. I did make several kit knives before I tried making my own, and learned a lot from just doing those. Here's a list of books/videos/kits I found looking through a couple of my knifemakers supply catalog:
Texax Knifemaker's Supply: Website
at
www.texasknife.com. Phone: 888 461 8632(orders) 713 461 8632(information). Catalog is $4.00 or you can order from the online catalog.
Books:
THE TACTICAL FOLDING KNIFE by Bob Terzoula(who's a darned good maker) is solely about how to make liner-locks. Catalog # PUB18 Price: $16.95.
HOW TO MAKE FOLDING KNIVES by Ron Lake, Frank Centofante and Wayne Clay(three of the really great makers). Cat # PUB01 Price: $14.95
Videos: None
Kits: Custom Liner Lock Kit: Supposedly has everything in it to build a liner lock except the handle scales. Includes parts/torx wrenches/instructions/parts list/diagram Cat # BL605 Price: $39.95
Sheffield Knifemakers Supply:Website
www.sheffieldsupply.com(PDF catalog only). Phone: 800 874 7007(orders)
386 775 6453(catalogs/info). Catalog $5.00
Books:
THE TACTICAL FOLDING KNIFE: same as above. Cat # LE74 Price $16.95
HOW TO MAKE FOLDING KNIVES: same as above. Cat# LE26 Price $15.95
Videos:
LOCKING LINER: VOLUME 4 features Johhny Stout(one of the best of the Texas Knifemakers). Over 1 hr. Price $25.00
Kits: They have a one handed opener that LOOKS like a liner lock. Don't know if it contains everthing you need(except handle scales) or not. You'd have to call them.
There are a couple of other commonly used catalogs out there from Jantz Supply and K&G, but haven't used them in years. They're both online.
Hope this helps.
