Due to the volcano disrupting flights in Europe The lonely planet has been offering their european city guides apps for free. The offer ends Thursday 11:59pm GMT so there is still time to get them. Normally they run around $12/ea or there abouts. They have a wealth of knowledge on the specific cities and are useful for anyone planning a european holiday.. or just wanting more free apps. Just search in the app store for Lonely Planet and it should show up as 1 of the options.