This book is a visually rich resource, providing the reader with 2,500 graphically clear drawings of signs in black and white, alongside with Carl G. Liungman's explanations of their origin and uses. Browsing the pages is rewarding for the artist looking for inspiration. There is plenty of it -- the book contains some 1,600 articles, and an additional 100 pages with essays on ubiquitous/especially interesting signs or sign systems (such as the Mystical Pentagram, or the signs of the Alchemists).
The explanations are usually to the point, although I find that Liungman occasionally strays too far away from the subject at hand. The sections about the astrological systems of signs are particularly abundant in information, and would have gained from being more carefully edited. The selection of signs, however, is excellent; it even includes modern ideograms from the Internet age, such as the At sign.
Symbols -- Encyclopedia of Western Signs and Ideograms really excels when it comes to searching for signs that the reader does not yet know the name of. Using a taxonomy scheme of his own, Liungman has classified the signs into 54 distinctive groups. The reader can navigate to any of the groups simply by describing the sign in terms of "Crossing lines/Not crossing lines", "Single-axis symmetric/Asymmetric" and so on. A quick glance at the right group overview page is all it takes to find the right match.
This book is highly recommended.