Currently, there are two different books for R&H:
Imperial Armour Vol.13: War Machines of the Lost and the Damned
https://www.forgeworld.co.uk/en-US/Imperial-Armour-Volume-Thirteen-War-Machines-of-the-Lost-and-the-Damned - From 6th edition, so no detachments
- Renegades can be dedicated to all four gods
- Rest of the book is additional stuff for
CSM and daemons
Imperial Armour: The Siege of Vraks
https://www.forgeworld.co.uk/en-US/Imperial-Armour-The-Siege-of-Vraks - No Tzeentch and Slaanesh (for story reasons)
- 2 detachments: one for large hordes and one for Nurgle renegades (the latter can also be used by
CSM)
- Rest of the book is a Death Korps army list and special characters for various codices
If you still want to go for one of the old books, each part of the trilogy had a slightly different version of the Renegades list: Imperial Armour 5 was Chaos Undivided,
IA 6 was Khorne,
IA 7 was Nurgle.