I have only recently come across Steve Mack's work. It fascinates me! His use of texture and colour within his illustrations is marvelous.. and they are simple!
His figures are unique and stylistic, again he has used textures to put emphasis within his images..
He has created a number of illustrations for greetings cards, and produced children's picture books. Maybe I'm just seeing it myself but it reminds me quite of the work of Jim Flora. Fantastic!