>Could someone recommend a book that explains the National Register
>nomination process for buildings and historic structures?

You may want to start with national Register Bulletin 16, "Guidelines
for Completing National Register of Historic Places Forms" published by
the National Park Service... 133 pp.

Call your State Historic Preservation Office located in your state
capital for assistance.  You will have to check which branch of state
government contains the SHPO.

HVTaves
Southern Forest Heritage Museum
Long Leaf, LA  71448