I really enjoy the Saitenwege books by Michael Langer, so I decided to order this book as well. The book contains 70 pieces, ordered in difficulty. In my opinion this book is a fantastic combination of classical and newer music. It contains pieces by Brouwer, Sor, Barrios, but also a guitar arrangement of Pirates of the Carribean, a guitar piece by Roger Waters and many other interesting pieces.
The notation is perfectly clear and the fingering is good.
I would say the level of the pieces is intermediate to advanced. According to the book, the hardest piece in it is Un Dia de Noviembre by Leo Brouwer.