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Cover art

For cover art, Bloomsbury chose painted art in a classic style of design, with the first cover a watercolour and pencil drawing by illustrator Thomas Taylor showing Harry boarding the Hogwarts Express, and a title in the font Cochin Bold. The first releases of the successive books in the series followed in the same style but somewhat more realistic, illustrating scenes from the books. These covers were created by first Cliff Wright and then Jason Cockroft.

Due to the appeal of the books among an adult audience, Bloomsbury commissioned a second line of editions in an 'adult' style. These initially used black-and-white photographic art for the covers showing objects from the books (including a very American Hogwarts Express) without depicting people, but later shifted to partial colourisation with a picture of Slytherin's locket on the cover of the final book.

International and later editions have been created by a range of designers, including Mary GrandPré for US audiences and Mika Launis in Finland. For a later American release, Kazu Kibuishi created covers in a somewhat anime-influenced style.