With Mystic River Lehane catapulted himself to the top of the thriller psychological and mind-games genre. It must have been a very hard act to follow. With Shutter Island, Lehane almost pulls off the ultimate writer’s coup of going one better. Almost, but not quite; but it is still an extraordinary thriller, well above the median in the genre.

In the summer of 1954, Teddy Daniels and his partner, Chuck Aule, US Marshall’s are asked to track a female inmate who has, apparently, escaped from a Hospital for the Criminally Insane. The escape seems impossible: the hospital is on Shutter Island, separated by miles of sea and cragged cliffs and buffs from anywhere. Solando was barefoot. The room was locked. There were guards at all exit points. And there is no evidence of her anywhere.

Why was Solanda incarcerated at all? Apparently, she killed her own children (shades of Medea?) and now lives in her own dream world in the Berkshires, treating all around her as postmen, policemen and other seemingly ordinary denizens of a seemingly ordinary life.

There’s nothing ordinary about the hospital, or the island itself. In fact, everything is just a little bit off-kilter, just a shade too extraordinary. About a third of the way through, we find that this is true of Daniels himself — his motives for being there at all are not what we believed. There is definitely something extremely sinister going on behind the scenes at the hospital. Solanda leaves a code, apparent gibberish; but Daniels unravels it and with that unravelling comes the unravelling of his own persona. What really is going on here? Is this some top-secret installation that is permitted to experiment on patients with new drugs and surgical procedures? The two Marshalls are mystified by the stonewalling from the hospital staff: no, they can’t see some records. No, they can’t look at some logs. Everything seems shrouded in mystery: codes; missing records of a recent inmate; the inaccessibility of “Ward C”, spoken of only elliptically and in hushed tones, covertly; a lighthouse that apparently treats sewage, yet is surrounded by an electrified fence and guards.

A hurricane hits the island. Communication goes down, all of it. Now even the ferry back to the mainland is out of the question. Daniels and Aule are stuck here and, it would seem, being slowly driven mad.