Two new reviews of Collateral Knowledge were recently published.
The first one on Japanese Law and the Asia-Pacific:
http://blogs.usyd.edu.au/japaneselaw/2013/02/riles.html
The second one in the European Journal of International Law, Vol. 23, issue 4, pp. 1194-1199, online version here:
http://ejil.oxfordjournals.org/content/23/4/1194.full?sid=bc618206-e8fb-49a7-bd99-706be9776315