This book is the "Western-wife-of-Moroccan-husband" dream come true, & is the most well-researched, comprehensive manual on Moroccan cuisine I've seen. The high point is Wolfert's very detailed lesson in properly preparing & steaming Moroccan couscous grains (a far cry from our boxed couscous), a lesson often lacking in other cookbooks. Another gem is her extensively-researched compilation of ras el hanout components. She clarifies western-translation of Moroccan ingredients, provides useful preparation shortcuts, & helpfully suggests alternative ingredients & equipment for the western cook. Importantly, she points out ( & even provides a map with detailed examples) regional differences in preparation of many dishes - differences of which many Moroccans themselves may not be aware. This information is vital for the western wife attempting to prepare her Moroccan husband his favorite home-cooked meal.
The book is also a great read, esp. her stories of life in Morocco, & excellent cultural/religious background information. It has tons of useful reference material, including complete menus, specialty-food suppliers in the US, a full discussion of the spices/herbs/waters used in Moroccan cuisine, et al.
Most importantly, after some practice on my part, my picky Moroccan husband has been thrilled with the results!
I would also highly recommend Robert Carrier's "Taste of Morocco" (see his shebbekia recipe); & for helpful, color photos (& recipes of course), Kitty Morse's "Cooking At The Casbah" & Fatema Hal's "The Food of Morocco" (from the "Food of.." series).