NYC upper Harlem line

I want to model some parts of the Upper Harlem line. I live by the Copake Falls station and as a kid remember the trains going through. But I am trying to find all kinds of info. Anybody know of any boosk out there or video? thanks

Rails Along The Hudson.

Softback book. Excellent black & white photos. Probably be out of print but may be available in libraries or on e-bay. Nice shots of steam, cab & hood diesels and boxcab electrics.