Improve your Intuition
Improve Your Intuition is a set of three paperback pamplets (about 40 pages each) by Takagawa Kaku published in 2001 by Slate and Shell based upon articles that appeared in Go Review.
Volume 1: Intuition in the Opening
sample pages,
publisher's blurb
Volume 2: Intuition in the Middle Game Part 1: Attack and Defense
sample pages,
publisher's blurb
Volume 3: Intuition in the Middle Game Part 2: How to Reduce a Moyo
LordOfPi: 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.
sample pages,
publisher's blurb