I have a book called "Jesse and Frank James:
The Family History " by Philillip W Steele, published by Pelican Publishing Company, Inc 1101 Monroe St Gretna, LA 70053 in 1991. I am not sure now where I bought it.

It contains names of much of the family and connections, some family pictures ( ranging from those of Frank and Jesse, their mother to some of today's descendants), as well as locations where the family lived .and is pretty interesting. Hope it can still be found and will be helpful.
Marilyn H Moore