American Woods by Romeyn B. Hough

This is a wonderful resource for wood identification, and if you are performing research work. This book, while rare, is still available on the used book market, a complete set of these books would cost thousands, the cross sections in each book, are real wood, meticulously placed on each page.

Quote

Radial, tangential, and cross-sections of 350 North American woods from the 14-volume rare book The American Woods, published between 1888 and 1910 by the author, Romeyn Beck Hough. The images can be accessed by volume number or by the scientific or common name of each tree.

Source: Subject website