Not a book I particularly enjoyed reading, but I am very glad for having read it. The more I thought through the various character lines and conceptual turns after finishing, the more I appreciated what Egan was doing and the confidence with which he pushed forward. What a unique mind and voice!
Surprisingly not as impenetrable as I feared, but probably a better match for some one more comfortable in esoteric maths. Restraint is the most critical survival skill.