If you like words (and I do), this saves you £25. Free postage if you're buying more than £15 worth of stuff off Amazon. Bargain.
This book will be most useful to students of the language and to general readers who want more detail than can be gleaned from the average dictionary. Despite its physical size, approaching that of a desk dictionary, its scope is limited to the most common 25,000 or so words (only a small proportion of those in the average desk dictionary, though many more than in the other works cited above). Deep delvers will need to seek out a more detailed etymological work for less common terms.