Barbara Catchpole 
Pig is a Blue Baboon’s Bottom [PDF ebook] 

Pig’s class at school all have to bring in something they don’t use anymore. It all starts well (even though Pig takes in his mum’s wedding ring), but then things go wrong and Pig accuses Raj of something terrible. Raj is very upset and calls Pig a blue baboon’s bottom. That’s Raj’s worst insult. Can Pig do anything to restore his friendship with Raj?Boys love PIG! Peter Ian Green has another hilarious adventure in this book, one of the bestselling series ‘PIG’ by Barbara Catchpole. Coupled with fantastic black-and-white illustrations and an easy-to-read diary format, the laugh-out-loud humour and tale of friendship will appeal to all readers.