The initial batch of three titles is available at

Three olympic city guides. They have lots of clickable links and they all click-call to the relevant local phone numbers. By our count, 1,485 telephone numbers in the London guide, 548 in the Beijing guide, and 564 in the Sydney guide. When we saw the London guide with its density of very useful phone numbers, we had to see about generalising from the eight digit (London) phone numbers to get valid (+44) 12 digit international numbers. Phone numbers will not always be parseable, but in these books they were. The London book also has lots of post codes which link to Google maps of the locations.

Yet more iPhone excitement. The titles are free to search in the shop, but you dont get the clickability from the search results. For that you need to buy the books. So attractively priced at £4.95 each.