She continued her education at Warwick University, where she read English and American Literature.
Lewis Jones' main titles concern Cassie at the Ballet School.
The covers of the original books show Sophie Bould and Jessie Jones.
Mal Lewis Jones is also well known for the series of educational books published by Heinemann, about Frisky the Lamb.
Their daughter was the illustrator of Poppy Cat, Lara Jones, who died aged 34, in 2010.