These volumes are often over 1500 pages each, and contain detailed schematics and alignment instructions. Chassis/Tube layout diagrams were provided, but it was rare to see any photographs like those in Sams. Original volume pricing was $7.50 each, and was $10 each after volume 6. It was common for service people to mark a chassis using a grease pencil "R14" indicating Rider's vol 14 for the next person who worked on the set. There is a television series also, but theose are not as common. Invariably, when people refer to Rider's, this is the series they mean.
I have listed the copyright dates on volumes 2-15 in hopes that it will help you date a set.