The novel, as an homage within an homage, begins as the original does with the disorientation of both the reader and the narrator as they awake and try to work out why their world has changed.
Twenty-nine years on from John Wyndham's classic, the original narrator's son David takes up the tale. Those unfamiliar with 'Day of...' (shame on you!) will be neatly brought up to date by his reminiscences in which he gives an overview of post-apocalyptic life among the Triffids, which the population now harvest to provide the raw materials of daily existence.
Clark is true to the spirit of the original - managing to capture Wyndham's style - and cleverly creates a society which, because of the lack of scientific and social development, has changed little from Wyndham's England of the Nineteen Fifties.
Due to a combination of unfortunate events David is taken to New York which is being ruthlessly controlled as an apartheid slave society where blind and black people are excluded from 'whites only' areas.
In a sense this can be seen as a continuation of social values which were acceptable, if not widespread, in Nineteen Fifties America, and may indeed be prevalent in today's USA in many areas.
My gripes are minor. The Triffids themselves are lessened by new and improbable mutant forms. An aquatic species emerges in the USA where, ironically, all the Triffids are bigger and nastier than their European counterparts. This might have been expected in warmer parts of the US (The original talks of ten-foot specimens found growing in Africa) but not in the more temperate New York. Some sixty-foot specimens appear near the end of the novel which stretches credulity to breaking point for me, given that at least three independent communities have been studying the Triffids for the last thirty years and have presumably seen no major changes in the creatures' physiology.
Also, one might have expected some kind of climatic change with the loss of humanity's mechanised fuel-driven civilisation and the re-encroachment of vegetation in large areas around the world.
The ending, although exciting, seems somewhat rushed and contrived, but this didn't mar what I found to be an un-put-downable thriller, which hopefully will bring many new readers to the original novel to find out where it all started.