What ought to be an excellent reference on writing systems was ruined for me by the terrible quality of the printing in the edition supplied by Amazon (printed in 2006 if I interpret the colophon correctly). Many of the symbols reproduced in the book are rendered as illegible smudges. The Arabic symbols are mere splats of ink. Many of the tables contain IPA that simply can't be read.
The staff at Amazon were helpful but confirmed that other copied in their stock had the same problem.
High print quality is an essential requirement for a reference book on writing systems. This edition fails to meet that requirement by some margin.