The books are graded at six vocabulary levels, ranging from 250 key words (Beginning) to 2,500 key words (Advanced.) OXFORD BOOKWORMS LIBRARY New Edition STAGE STARTER BESTSELLER PACK (250 key words) contains one copy each of the following ten titles: Girl on a Motorcycle New York Café Drive into Danger The Fifteenth Character Mystery in London Sally´s Phone Escape Taxi of Terror Robin Hood Survive!