Martin Waddell is a writer of children's books from Belfast, Northern Ireland. He may be known best for his picture book texts featuring anthropomorphic animals, especially the Little Bear series illustrated by Barbara Firth.
Excerpt from Wikipedia, available under CC BY-SA 4.0.

Can't You Sleep, Little Bear?
1992
ISBN 9780785720362
Owl Babies
2002
ISBN 9780606291125
Owl babies.\Board book and soft toy
2002
ISBN 9780744549232
Can't You Sleep, Little Bear? Book and Play Set
1995
ISBN 9780744537987
Tu ne dors pas, Petit Ours ?
1995
ISBN 9782211032957