In reply to a13x:
You can go to SportSpecialist in Barzano` area (it is actually on the main road from Lecco) or have a look in the two main bookshop in the city centre (Cattaneo and Libreria Cavour, the first one is slightly better). For the area the most useful guidebook is probably the Versante Sud "Lario Rock Falesie" but you can ask me infos if you need!