For trekking and climbing maps and guides, check out Namaste. It stocks Maurizio Oviglia's Pietra di Luna (€50), a comprehensive rock-climbing guide covering the Cala Gonone, Jerzu and Baunei areas; Corrado Conca's Arrampicare a Cala Gonone (€20) and Sentiero Selvaggio Blu (€17), covering the stunning seven-day Selvaggio Blu hike; and La Sardegna in Bicicletta (€14), detailing 1000km of cycling routes.
You can also pick up walking maps and travel guides here.