Floss is a four-year-old Highland cow whose content and happy life is turned upside down when her newborn son is cruelly taken away from her. Under the guidance of her best friend, Ned the Donkey, she determines to escape and to find and rescue her son. During her nine months as a fugitive in the Lincolnshire countryside, Floss is befriended by a fourteen-year-old girl Susie, who commits to helping Floss in any way she can. Matters take a nasty turn, though, when Floss is recaptured and destined to end up as food for humans. Can Susie save the Highland cow she has befriended, or has Flosss time finally run out?

Sue McAuley (Clarkson) was brought up in Castleford, West Yorkshire, where she lived until 2008. From a very early age, she was an animal lover, starting with a drawer full of pet mice (much to her parents' dismay) when she was eight years old. She doesn't recall where her love for all things equine originated, but she bought her first pony as a fourteen-year-old from money raised washing up in a local cafe. Sue moved to the rural village of Ealand, North Lincolnshire, in 2008 "to give her ponies a better life." It was here in this village that she came across a wild Highland cow that had escaped months previously. It is Sue's interactions with this cow that inspired her to write Moo, her first novel. Sue is also a keen watercolour artist specializing in landscapes and, of course, animals.