The Voyages of Doctor Dolittle by Hugh Lofting, updated by Christopher Lofting (paperback)
Author: Hugh Lofting
Nine-and-a-half year old Tommy Stubbins is about to go on an adventure of a lifetime! Being assistant to the genius (and eccentric) Doctor Dolittle means no day is quite the same, especially when they set sail on the high seas. After a hair-raising shipwreck lands them on the floating Spidermonkey Island, they meet the mysterious Great Glass Sea Snail who could change their lives forever...