Looking for good book on electrical repairs

[IIA]

Has anyone found a good book for learning about Land Rover or Lucus electrical repairs? I have the Green Bible but I noticed that British Wiring sells a book called TR6 Electrical Maintenance Handbook by Dan Masters. The description says it applies to other British cars too. Has anyone tried it or found another good one?

[IIA]

I was going through my old posts and found this one. Since posting it, I found the Lucas Fault Diagnosis Manual - lots of websites have it and it's pretty good. Here's one link, but if it goes bad there are many others: https://www.gomog.com/allmorgan/LucasFault.pdf