When I first came to Taiwan back in 1999 I had a copy of the fourth edition of Lonely Planet Taiwan. I have since bought the fifth and sixth editions. The seventh edition of Lonely Planet Taiwan was published in November 2007 and I recently got a copy.
The seventh edition was written by Robert Kelly and Joshua Samuel Brown, both long term residents of Taiwan. Robert Kelly also contributed to the sixth edition and Joshua is the author of Vignettes of Taiwan.
Lonely Planet didn't just stick a new cover on an old book. The seventh edition has been extensively updated and includes some new places. The east coast section has been expanded with details of many of the interesting places between Taidong and Hualian as well as the expected coverage of these two cities. There is also more detailed coverage of Taiwan's islands.
There are always a few places that will get left out of any guide book. Nanzhuang and Taipingshan were two that I thought were notable for their omission. However, I don't think this is such a bad thing. It still leaves a few interesting places for the traveller to discover and adds an element of surprise. There are also a number of places listed in the book that I had never heard of but am certainly curious to visit. The Danayigu Ecological Park is one. I suggest you read the book if you want to find out more.
The coverage of hiking is great and there a range of hikes covered from easy walks that take a few hours to multi-day expeditions. I like the writing style of the with its many interesting little anecdotes.
There are plenty of maps, as is the standard for Lonely Planet guides. The map keys have place names written in English/Pinyin as well as Chinese characters. Names in the text also have pinyin with tone marks which should be useful for getting the pronunciation right.
Overall, this is an excellent guide that would serve any traveller in Taiwan very well.
*purchase Lonely Planet Taiwan from Amazon.com
#also posted at Taiwanderful.