Its not the area that is the drawback, a fantastic wilderness but there are few guidebooks or promotions. I live in Harrogate and neither of the WH Smith and Waterstones walking sections have one book on the Scottish borders walking. Also the lovely towns like Hawick, Peebles, Selkirk, etc do't seem to be promoted South of the Border. Probably a good thing though - Keswick in the Lake District was a great mecca for walkers in the early to mid 90's - now its too much touristy and the best thing about the lowlands is their remoteness. I want to walk them that way so don't promote the area too much until I have been!
Incidentally, best book for walking if I stay in Peebles?