The reason I ask is that an increasing number of my 'professional' texts are becoming available on this kind of platform - including many of the older ones.  I already have 3 bookshelves of this kind of book and wondered whether I ought to sell the books - perhaps via Ebay or Amazon - and repurchase them as electronic volumes - thus saving the need for shelf after bookshelf!!

I'd have to agree that nothing beats curling up with a good book with something great to drink - but how often does one do that with a 'professional' text anyway!!??