The One and Only Series 4 Books Collection Set By Katherine Applegate (One and Only Ivan, The One and Only Bob, The One and Only Ruby & The One and Only Family): One and Only Ivan: Ivan is an easy-going gorilla who has spent his life performing for the crowds at the Exit 8 shopping mall. He rarely misses life in the jungle. In fact, he hardly thinks about it at all. But everything changes when a baby elephant called Ruby arrives and Ivan realises he must find a new life for them both. The One and Only Bob: Bob sets out on a dangerous journey in search of his long-lost sister with the help of his two best friends, Ivan and Ruby. As a hurricane approaches and time is running out, Bob finds courage he never knew he had and learns the true meaning of friendship and family. The One and Only Ruby: Ruby’s story picks up a few months after the events of The One and Only Bob. Now living in a wildlife sanctuary, Ruby’s caretaker from the elephant orphanage in Africa where she grew up is visiting. Seeing him again brings back a flood of memories both happy and sad of her life before the circus, and she recounts the time she spent in the African savannah to Ivan and Bob. The One and Only Family: Ivan has been happily living in a wildlife sanctuary, with his friend Ruby next door in the elephant enclosure, frequent visits from his canine friend Bob, and his mate Kinyani by his side. And in the happiest turn of all, Ivan and Kinyani have welcomed a set of twins to their family!