Inklings
"Properly speaking," wrote Warren Lewis, "the Inklings was neither a club nor a literary society, though it partook of the nature of both. There were no rules, officers, agendas, or formal elections." As was typical for university literary groups in their time and place, the Inklings were all male. 
Readings and discussions of the members' unfinished works were the principal purposes of meetings. Tolkien's "The Lord of the Rings", Lewis's "Out of the Silent Planet", and Williams's "All Hallows' Eve" were among the novels first read to the Inklings. Tolkien's fictional Notion Club (see "Sauron Defeated") was based on the Inklings. Meetings were not all serious; the Inklings amused themselves by having competitions to see who could read the notoriously bad prose of Amanda McKittrick Ros for the longest without laughing.
C. S. Lewis
Many books have been inspired by Lewis, including "A Severe Mercy" by his correspondent and friend Sheldon Vanauken. "The Chronicles of Narnia" has been particularly influential. Modern children's literature has been more or less influenced by Lewis's series, such as Daniel Handler's "A Series of Unfortunate Events", Eoin Colfer's "Artemis Fowl", Philip Pullman's "His Dark Materials", and J. K. Rowling's "Harry Potter" . Pullman is an atheist and so fierce a critic of Lewis's work as to be dubbed "the anti-Lewis". He considers C. S. Lewis a negative influence and has accused Lewis of featuring religious propaganda, misogyny, racism, and emotional sadism in his books. Authors of adult fantasy literature such as Tim Powers have also testified to being influenced by Lewis's work.