I ordered the book and it just arrived today. It is a very short book coming in just under 250 pages (including glossary).
While it does mention the NDK for 3.9 at the beginning of the book, it does seem to be aimed at 3.1.
Everything in it is very low level. It starts out describing 68k processor instructions. There's a 12 page chapter on getting started with Assembly (ASM-Pro) and a 2 1/2 page chapter on using C (VBCC).
The rest of it feels like a severely abridged version of the ROM Kernel manuals (and related books).
This book is definitely aimed at a very niche/advanced type of programmer.
