Volume 3: Intuition in the Middle Game Part 2: How to Reduce a Moyo
by Takagawa Kaku, 9d.
See the publisher's blurb
Sample pages http://www.slateandshell.com/pdf/ssgr003.pdf.
The book has 44 pages and deals mainly about different kinds of moyos and how to reduce them efficiently. It talks about moyos around different corner enclosures and Hoshi - formations (i.e. Hoshi with knight's move extension). The book also explains various attachments on corner enclosures and how and when to use them.
I found this book quite hard but it helped me (especially the descriptions of those funny looking shimari attachments that I never really understood). The book is probably suited best for the 10k-5k range. I wouldn't recommend to read it before 10k.
-- LordOfPi