I used several texts equally. I'd say my top ones were Faust, Board Stiff 3, and a large text similar to Big Red. My residency had it and I found it to be quite useful. I believe it was copyrighted by anesthesiology consultants. I just did an online search for it and came up with Michael Ho. I don't remember seeing his name anywhere on the text but maybe this is where it was from? It had several pages of basic review, pre-op, intra-op, and post-op questions with their answers and a quick summary. It was around 400 pages in a large binder so maybe someone can help me out.
KOTB is much more concise than any other book. I can read through that very quickly. Trying to be unbiased, I'd say it is the most concise, high yield oral board review book out there.