Dave, welcome!
The only other "mainstream" book I know that covers the K&S is Gerry Doekson's Railways of the West Kootenays. It is more of an overview of all the lines that were located in the Slocan around Arrow, Slocan and Kootenay lakes. It is very good but doesn't have a detailed roster for the K&S.
Mike, in fact Turner's book has a picture of the rotary on the RGS because there isn't a good full image of the rotary on the K&S. Looking through my CPR Slocan images I thought there was a good one of it in operation on the standard gauge replacement for the K&S but I so far can't find one.
Dave Eggleston
Seattle, WA