21.   He presses the cheese into a thick sheet and slices the sheet into rectangles, each about the size of a paperback book.

22.   His puzzles also began to appear in paperback books and calendars, and he became known for the variety of his puzzles.

23.   However, Mesa Libraries soon plan to offer some Rocket E-Books, which are about the size of a regular paperback book.

24.   I put a paperback book, not hardcover, under it.

25.   In addition to the handheld digital devices, there are new portable computers that are not much bigger than a thin paperback book.

26.   In addition, the magazine sells about a million copies of its paperback book version of the college guide.

27.   Inside their cells, the kids are allowed to keep one paperback book, two sheets of paper and a pencil.

28.   It is about half the size of a paperback book.

29.   It will probably be a few inches thick and not much longer than a paperback book.

30.   Less than a month after the arrest of a Unabomber suspect, a New York publishing house will be rushing into print with a paperback book about the case.