Becca Stadtlander is an American illustrator and artist. She has been working for The New-York Times, Penguin Books and HarperCollins amongst others and I definitely understand why. Her work is bright but not bold, beautifully detailed and poetic. I love them and especially the ones with a warm palette. Perfect treat for Autumn! (PS: you can buy her gorgeous prints on her etsy shop). More of her art here.
The Art Gazette 