Below is a listing of all the currently available secondary REH reference works in this collection. These volumes are intended to aid the REH scholar to see more details about REH’s life, his friends and family, and unusual items of potential interest. Many of these volumes were compiled by REH scholar Rob Roehm.

All secondary reference volumes are available as either trade paperback or hardback with printed boards. This series is unlimited, though on occasion contents are updated as new material is located.