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 1 BESTSELLER PACK (400 key words) contains one copy each of the following ten titles: The Adventures of Tom Sawyer The Elephant Man A little Princess Love or Money? The Monkey´s Paw The Phantom of the Opera The President´s Murderer Sherlock Holmes and the Duke´s Son White Death The Wizzard of Oz