The Book of the Exhibition. Beautiful design, magical Jim Kay illustrations and unseen treasures from J K Rowling's own archive combine in this unique souvenir of the British Library's much-anticipated exhibition, marking the 20th anniversary of 'Harry Potter and the Philosopher's Stone'. This is the ultimate gift for Harry Potter fans, curious minds, big imaginations, bibliophiles and readers around the world who miss out on the chance to see the exhibition in person.