I was saddened to hear of the death of John Christopher, an important British science fiction author. Details and tributes here:
Although most of his adult science fiction novels are out-of-print they are well worth seeking out in secondhand bookshops and on the internet (e.g. AbeBooks.com). The books are entertaining and well written, and well worth your time. Especially if you like post-apocalyptic dramas.
Thank you, John Christopher, for the pleasurable reading you have left us.