I was in Cartographics on Unley Rd the other day and Alex showed me a recent production of theirs, a new map of the Adelaide Hills and Barossa regions. It includes all the trails. (Cover photo on their website). As the old Hills Transit Map is no longer available and will no longer be updated, this one makes an excellent replacement for anyone heading into the hills for a walk. [Memo: All trails now officially closed during the Fire Ban Season].
Also, some chap has recently self published an A4 sized guide to the Adelaide Hills, again available at Cartographics. It's a flora, fauna and human history piece with lots of great photos. I can't find anything about it on the web yet, not even on Carto's website.
Carto's is just up the road a bit from Woolies, 150m north and on the other side.