From perennials to bulbs to tropical exotica, Botanicum is a wonderful feast of botanical knowledge complete with superb cross sections of how plants work.

Kathy Willis is the director of science at the Royal Botanic Gardens in Kew, England. She is also a professor of biodiversity in the zoology department at the University of Oxford and an adjunct biology professor at the University of Bergen.

Katie Scott studied illustration at the University of Brighton before moving to London. Her clients include the New York Times and Nike.