Very very good book. I'd been looking for a workbook for Arabic Calligraphy for years but never found any. This is not just a workbook, but also a very good one. Lots of good information about the process, and beautifully clear letters and instruction.
It's probably important to point out that this is about calligraphy, and not about just writing Arabic as a language, since that does differ.
I had wondered about the 'ayn letter, and had tried to reproduce it with oblique nibbed pens, and here was the revelation of how they arrived at that shape! Well worth it. I wish this author would do a series of such books on the different scripts.