I really love the cover illustrations of the Harry Potter series of my childhood, the Harper Collins US hard-cover books. Those were designed by Mary GrandPre. Her soft, pastel illustrations captivated my 6th-grade self. But, while I was walking around Amsterdam, I saw a promo poster advertising a new set of paperback HPs with covers illustrated by Erik Kriek and designed by Rob Westendorp.

You can see larger versions at Westendorp’s website.