The Macmillan Readers series are carefully graded from Starter to Upper Intermediate (A1-B2) to help students choose the right reading material for their ability. Our list of titles includes great stories from both contemporary and classic authors, and now contains our very first Shakespeare Readers at Pre-intermediate level. The Call of the Wild - A companion piece to White Fang, The Call of the Wild is the story of Buck, a domestic dog who is suddenly stolen and sold to gold prospectors. In this new - and hard - life, Buck's natural instincts are awakened to the call of the wild.