The first thrd of this book is taken up by very lengthy discussions of  technology and maths.  I could not get a hold of the hero at all.  He did not capture me and I could not identify with him. He was a techie and was naive and shallow and had a teenager outlook.  This is fine as he has spent his whole adult life cooped up with a smart computer and his maths problems.  However he just didn't cut it for me as the hero.  I found him frustrating.  The next books in the series are not so fixated on the technology and IMO are better for it.  PS the author replied to my review and so I encourage readers to write as he seems to care about what readers think