Conversation so far:
what is Thomas Malory's identity
Malory’s identity has never been confirmed, but the likeliest candidate is Sir Thomas Malory of Newbold Revel in Warwickshire.
how is Thomas Malory described
He is described as a knyght presoner, distinguishing him from the other six individuals also bearing the name Thomas Malory in the 15th century when Le Morte d'Arthur was written.
did Thomas Malory write anything else
The sources of the romances that make up Le Morte d'Arthur correspond to some degree with those of a poem called The Wedding of Sir Gawain and Dame Ragnelle
how were Thomas Malory's books recieved
There has been some argument among critics that Malory's Le Morte d'Arthur was primarily intended as a political commentary of Malory's own era.
was Thomas Malory actually a knight
He was knighted before 8 October 1441, became a professional soldier, and served under Henry Beauchamp, 1st Duke of Warwick
who made Thomas Malory a knight

Question: what was his most famous book
Self-contained rewrite: what was Thomas Malory's most famous book