31.   He took the course on Vietnam taught by Professor Kahin, whose books became the testaments of the anti-war movement.

32.   He ran into the opposite problem when he worked at Harvard Law School, where the comment book became a battleground.

33.   I was not thinking about writing a novel about the German resistance to Hitler, which is what the book became.

34.   In some ways the Cairo book fair has become a symbol of the fear that intellectuals have about speaking their minds.

35.   In the military, the book has become something of a cult classic, according to Army Capt. Robert Bateman, who teaches military history at West Point.

36.   In the end, his book becomes more a tribute to a handful of brave Boston souls than a biography of Minkins himself.

37.   In this adaptation, an enchanting book has become an enchanting film.

38.   It can be proved empirically that many gift books become gift-book-size coasters moments after they are unwrapped.

39.   It dealt only with four contracts signed long before electronic books became technologically possible.

40.   It may be a fearfully short time before this book becomes a common reference tool for every Washington policymaker, journalist, and national-security-minded citizen.