I ordered my MROJ from Fred H. via the gunboards listing. I asked for him to sign it. I had both the book and signature in about a week.
The T99 book edited Don Voight and Doss White is useful and affordable as well. They, and the book, can be found on gunboards also.
The T38 book by Frank Allen is reported to be outstanding but I have yet to buy one. Super nice guy too.