Yes a great book, and has been discussed a couple times before
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www.winterhighland.info]
i have done the round ben alder one and the inschraich one, have ridden both areas before, but had never done the loops kenny recommeneded and they were good,
i hope to do the achnashellach one, as have walked up there and always thought it looked good for biking, nice to have someone else research it for you!