Carbonel is a children's book series by Barbara Sleigh, first published by Puffin Books from 1955 to 1978. Also published in the US by Bobbs-Merrill from 1955. It has three novels, first Carbonel: the King of the Cats and two sequels, The Kingdom of Carbonel (Puffin, 1961) and Carbonel and Calidor: Being the Further Adventures of a Royal Cat (Kestrel Books, 1978), and was based on the old British folk tale "The King of the Cats". The first edition of Carbonel was illustrated by V. H. Drummond, that of Kingdom by D. M. Leonard, and that of Carbonel and Calidor by Charles Front. Carbonel was named a Book of the Month by Young Elizabethan magazine, as a "most sensible, it-could-easily-have-happened fairy story".