The Day of the Triffids
Overview
The Day of the Triffids is a post-apocalyptic novel published in 1951 by the English
English people
The English are a nation and ethnic group native to England, who speak English. The English identity is of early mediaeval origin, when they were known in Old English as the Anglecynn. England is now a country of the United Kingdom, and the majority of English people in England are British Citizens...

 science fiction author John Wyndham Parkes Lucas Beynon Harris, under the pen-name John Wyndham
John Wyndham
John Wyndham Parkes Lucas Beynon Harris was an English science fiction writer who usually used the pen name John Wyndham, although he also used other combinations of his names, such as John Beynon and Lucas Parkes...

. Although Wyndham had already published other novels using other pen-name combinations drawn from his lengthy real name, this was the first published under the John Wyndham pen-name. It established him as an important writer, and remains his best known novel.
The protagonist is Bill Masen, who has made his living working with "triffid
Triffid
The triffid is a tall, mobile, carnivorous, prolific and highly venomous fictional plant species—the titular antagonist in John Wyndham's 1951 novel The Day of the Triffids and Simon Clark's 2001 sequel The Night of the Triffids....

s"—tall plants capable of aggressive and seemingly intelligent behaviour.
 
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