This is one of a set of 25 mini-guides published by Rough Guides to celebrate their 25th anniversary. Each is in a 25-topic format. I wasn't able to find an electronic list of the set, though they're pictured on the back cover flap of volumes in the series and are listed individually at www.roughguides.com. Your bookstore may have a freestanding display. The books in this series (especially when presented face-out as a group) are best thought of as an appealing sampler tray, since more extensive or in-depth guides are available for most of the topics. Each book, in a slightly larger than 5" x 4" format, includes 25 double-page spreads; typically there's a large photo, a narrative (often a personal experience), and a "need to know" block with contact information, prices, etc. Sometimes there are additional inset photos. Following the main text is a section of more general information on the topic, with additional resources. The books are indexed, which should be a standard for non-fiction but often is not.

In general, the books are attractive and compelling. The text is easy reading; the tiny, tiny type is not, especially when one considers the likely age range of those who are willing to spend $1000 plus airfare for two weeks of helping move endangered turtle eggs, and the likelihood that they will need their stronger pair of reading glasses to read blurry white print on a dark background in Compact OED-sized type.

Most of the ethical considerations presented in this volume fall into the categories of pollution, where the money goes, and volunteerism. This is a good start, though I'd have appreciated more discussion of the ethical issues inherent in tourism in countries that violate human rights standards (as an example, there's a short section about Burma/Myanmar in the back section). Cost is a noticeable factor. A large number of the experiences are more expensive than I (or, I suspect, the typical Rough Guide reader) tend to budget on travel. I'd have liked a section within this set of 25 that highlighted the less-expensive options, including the option to spend a week volunteering in one's own community, for example. I suspect this volume is more of a dream book than a reality for many travelers with good intentions. For more affordable volunteer vacations, try the book Volunteer Vacations.

One nitpick: Yes, my carbon footprint is smaller if I walk rather than driving, no argument there. However, walking is not a "zero-carbon" activity, as asserted as the term "carbon dioxide" should reveal on a moment's reflection. If you're going to sling around terms like "carbon footprint," get your facts right. ( )