The Spotted Sphinx and Pippa's Challenge about Pippa and her cheetah family. Later, Adamson reached her goal of many years, when she obtained an African leopard cub. Penny was eight weeks old when a ranger acquaintance of George Adamson found her in 1976. Penny had a litter of two cubs before the publication of Queen of Shaba, Adamson's posthumous and final book.

During her lifetime, she created more than 500 paintings and line drawings. Her work included portraits of the indigenous populations commissioned by the government of Kenya,