Aleman de viaje / German to Travel (Spanish Edition) by Jordi Indurain Pons. $10.16
Online dictionary by PONS, a renowned German publisher of educational publications (part of Klett-Verlag). Website is localized and available in 12 languages. Also available as smartphone/iPhone app. Also offers other tools and resources, such as online translator and vocabulary trainer.
PONS - The free dictionary for foreign languages, German spelling and full-text translations.