Here is a URL to what those in the wood products industry call "the book" - basically it's 509 pages of whatever you would want to know about all different kinds of wood. Reading through "the book" I bet you'll be amazed just how much you'll learn.
Downloadable PDF is here --->...
If you have questions about wood, have two sites on the web that might interest you. While the first strictly deals with "Wood Handbook: Wood as an engineering material.
It’s best to read those only chapters that interest you vice downloading the whole thing. The chapter or files are in pdf...