Mog is lovable, forgetful , mischievous and often in trouble. The Thomas family love her dearly but ‘bother that cat!’ is the refrain that usually follows Mog’s latest calamity. In each story Mog finds herself at the centre of a family drama, often unwittingly created by her, but the tale always takes a turn for the better and Mog finds herself back on top!
Though Mog’s adventures are fictional, their inspiration was taken from real life. Mog was based on Judith Kerr’s own family cat, and the illustrations on her own family home in London. The names of the children, Nicky and Debbie, are the middle names of her own children and the appearance of Mr Thomas is inspired Judith’s husband, Nigel Kneale.