This provides a good logistics overview of Tasmania, long on help with sleeping, eating, and getting there.
We loved Tasmania, but did most of our travel planning on the Web, which gave much more of a feel for things than did any book. We bought and used both this book and Rough Guide to Tasmania. We generally found Rough Guide more useful, but seldom used them on our six days in Tasmania. We didn't use either book for recommending restaurants and entertainment, but the Lonely Planet was better than the Rough Guide at that.
This book has good descriptions of each area, with only a very high level picture of the whole country. Go to the Web to figure out what appeals to you. Then, a travel book can help, but travel books are still a bit in a pre-Web past, longer on accomodations and restaurants, where there's better information online. The two Tasmania books we used are short on vivid descriptions of the type "if you like this kind of thing, here's a place not to miss and why".