I got really excited when I saw that David Gibbins had released another book. Quite frankly, I was disappointed. There was little action, and while the discoveries were interesting enough, without the excitement of a race to find it first, or a determined bunch of artefact thieves to fend off, the book just wasn't that great. If I wanted to read something just about finding archaeological treasures, I'd much rather read something factual. That said, Jack Howard remains an interesting character, even if there aren't really any particularly new revelations about him, like there have been in past books. It did pick up towards the end, with some kidnapping and action, but not as much as in previous books. I'm glad I finished it, and it most definitely did (eventually) get better, but to be perfectly honest I wouldn't bother starting it in the first place. It was a disappointment compared to the excellent previous books, and had it not been by David Gibbins I probably would have given up long before the end.
I'm glad I didn't rush out and buy it like I nearly did, but I can't help but feel the series would've been better if it had finished at book four rather than have this addendum. However, if there are more books, on the basis that the first four were truly excellent (especially Atlantis and Crusader Gold) I'll probably still get them out the library, even if I won't be rereading this one. I recommend you read the others, I don't recommend you bother with this one. The interesting bit at the end doesn't outweigh the fact that it takes an awful long time to get even vaguely exciting.