Proper Methods in Preparing Stock
Quality work depends upon knowing how to correctly shape the parts of a piece of furniture. You can't just grab a board off of a pile, hack a few joints out of it, and sand it down. Properly fitted joinery requires that the stock be prepared appropriately. This is a concept that just doesn't get enough attention. I feel, especially for the beginner, but equally for the experienced woodworker, that one of the most underrated but best titles on this process is Working With Wood by Peter Korn. He provides an excellent treatise on milling a board four square using a variety of tools, so that you can match the method to what you have to work with. He even includes a couple of nice small projects. I cannot stress the importance of this book enough.
In addition to this book, Tage Frid's timeless classics Tage Frid Teaches Woodworking: Vols 1,2 and 3 are must haves in any serious woodworker's library. His style of construction does not appeal to me but his methodology is sound beyond question.
If you are into ornamental turning, The Principles and Practice of Complex Turning by Holtzapffel is a good, if not intimidating read. The Manual of Traditional Wood Carving by Hasluck is also a great reference. However, if you are a beginning carver, I recommend you check out the three videos made by Ray Kinman on carving. I am just a beginner, and he got me over the hump from being afraid to touch the wood with the gouge to relief carving in no time at all. You can reach him at www.masterwoodcarver.com. The videos are relatively inexpensive and easy to follow.
Learning about the History of Woodworking
All of the following works provide excellent information on various aspects of historical woodworking. The only books I won't list by name are the Woodwright Shop books by Roy Underhill, because they are all good and I recommend every one of them.
Hand or Simple Turning (Holtzapffel)
The Principles and Practice of Complex Turning (Holtzapffel)
Mechanick Exercises or the Doctrine of Handy-Works (Moxon)
The Complete Woodworker (Jones)
Tools: Working Wood in the 18th Century (Gaynor)
Old Ways of Working Wood (Bealer)
Green Woodwork: Working With Wood the Natural Way (Abbott)