Lonely Planet is offering some of its titles as e-books in the iTunes bookstore for the first time. To mark the occasion, the company is offering a free download of its "Lonely Planet's Best in Travel" guide through June 14. The book, which can be viewed on iPad, iPhone and iPod Touch, covers a range of travel trends, destinations and events worth exploring in 2011. The e-book will be priced at $4.99 after the promotional period. Details at lonelyplanet.com/ibookstore.