A powerful post-apocalyptic allegory of persecution & intolerance the Penguin Modern Classics" edition of John Wyndhams science fiction masterpiece " The Day of the Triffids" contains an introduction by M. John Harrison. Nuclear war has devastated the world bringing with it a host of genetic mutations. In the bleak primitive society that has emerged from its ruins any sign of deviation no matter how small is ruthlessly rooted out & destroyed. David lives in fear of discovery for he is part of a secret group of children who are able to communicate with each other by transferring thought-shapes into each others minds. As they grow older they feel increasingly isolated. Then one of them marries a norm with terrifying consequences. John Wyndham (1903-1969) the son of a barrister tried a number of careers including farming law commercial art & advertising before writing short stories intended for sale in 1925. After serving in the Civil Service & the Army during the Second World War he decided to try writing a modified form of Science Fiction which he called logical fantasy. Among his most famous books are " The Day of the Triffids" (1951) " The Kraken Wakes" (1953) " The Chrysalids" (1955) " The Midwich Cuckoos" (1957 filmed twice as " Village of the Damned") " Trouble with Lichen" (1960) & " Chocky" (1968). If you enjoyed " The Chrysalids" you might like Arthur Millers " The Crucible" also available in " Penguin Modern Classics". " One of those few authors whose compulsive readability is a compliment to the intelligence". (" Spectator")."