Books - Viento bundle XL

Books - Viento bundle XL.
A bundle existing of the four popular Viento books:
- The Art of Gliding (german & english in 1 book) written by Simon Lemmerer.
- Next Year of Gliding (german & english in 1 book) written by Bert Schmelzer.
- Framing the Sky (german & english in 1 book) written by Tobias Barth.
- Peak Soaring (English) written by Benjamin Bachmaier.