What it is, is the author, Timothy, writing his story of how he discovered this and the additional things discovered through his lifetime confirming it. It is a code based around his name, which when applied to the St. Petersburg Codex also revealed his grandfathers name, his wife full name and other personal information there hidden in the Biblical text. He goes on to show a few others he found such as reference to Kennedy's death and then one that hints at future.
Unlike the Bible Code which was found to be flawed, this code has passed all the scholarly tests and is accurate. There is too much in the book for me to try to summarize here but I do recommend it as an interesting read. There are photographs/diagrams throughout, illustrating certain things referred to in the book which is really helpful. At the end is a glossary and appendix, notes, index, and recommended reading.
On the whole I recommend it if it is a field that interests you. If you are interested in supernatural type occurances then you would like it, for example. I don't think it's a book for everyone as it does get technical.
Please note that I was sent a copy of this book for purposes of review however this opinion is entirely my own.