SFCrowsnest.com have just reviewed Fun With Rainbows and a rather spiffing review it is.
http://www.sfcrowsnest.com/articles/books/2010/Fun-With-Rainbows-by-Gareth-Owens-14890.php
Also in the same issue is an interview with Carmelo Rafala
http://www.sfcrowsnest.com/articles/features/2010/An-interview-with-Immersion-Press-publisher-Carmelo-Rafala-14859.php
http://www.sfcrowsnest.com/articles/books/2010/Fun-With-Rainbows-by-Gareth-Owens-14890.php
Also in the same issue is an interview with Carmelo Rafala
http://www.sfcrowsnest.com/articles/features/2010/An-interview-with-Immersion-Press-publisher-Carmelo-Rafala-14859.php