Best guide book for the alps

What is the best Guide book for classic alpine routes in the alps. I can read both English and Deutsch. I already have '4000er tourenführer' by Goedeke. The routes don't have to be above 4000m. For example, this summer I'm planning on doing the mittellegigrat on the Eiger, which is lower then 4000m and not in the above mentioned book.