There's been a glut of Da Vinci Code style books of late, for obvious reasons, and most of which I've had no inclination to read. Frankly, I found the original somewhat tedious, and only read to the end in expectation of an interesting denouement. Sadly, there was none, and it's been quite a mystery since why it has become so popular.
Thus this review (my first): profound disagreement with Jana on her comparison between this and the Da Vinci Code: "[The Secret Supper] lacks the dynamism, action, power, real suspense, complex plot, subplots and two-dimensional but larger than life characters of Dan Brown's bestseller." Eh??? For me DVC totally lacked any of the first 6, although I do agree on the 2-D (cardboard cutout) characterisation.
That is not to say this novel is particularly dynamic or action packed. It's not intended to be, being more of an intellectual mystery than a physical one. However, the characters are significantly more three-dimensional (here I agree with Jana - DVC is thoroughly 2-D) and I found the story telling enthralling and well paced. Basically it was a novel I could (and did) get wrapped up in, which was not something I achieved with Dan Brown's book.
I also agree with Jana that it's worth 3.5 stars. As she's given it 3, then I'm giving it 4 to average out! All in all an enjoyable, well above average holiday read. Incidentally, reading the Acknowledgements indicates that Savier started work on the book well before Dan Brown's book came out, so to class this as an offshoot is a little unfair. It's certainly better.