Description for How Your Body Works Hardcover. This classic Usborne book has been enjoyed by three generations since its first publication in 1975. It has now been completely reillustrated by the original artist, Colin King, to celebrate the 40th anniversary of Usborne Publishing. It covers all the basics of human biology in a fun and informative way. Illustrator(s): King, Colin. Num Pages: 48 pages, full colour illustrations throughout. BIC Classification: 5AH; YNT. Category: (JC) Children's (6-12). Dimension: 283 x 224 x 12. Weight in Grams: 512.