Tetraktys received a really nice review from Ben Rothke on Slashdot:
…For those interested in a cryptographic thriller, Tetraktys is an enjoyable read. The book interlaces Greek philosophy, mathematics, and modern crime into a cogent theme that is a compelling read. And if the exploits of Ambrose Jerusalem continue, we may have found the successor to [...]

A nicely written article by Mark Baard on Tetraktys came out in the business section of the Globe today:
RSA Labs scientist pens a tale of cybervillains

Either Ari Juels is living an amazing double life or he really does have the imagination to make it as a novelist.

But in his first work of [...]