61.   There are innumerable books on public speaking, dealing with everything from how to project your voice to what to wear.

62.   There were stacks of books on the floor.

63.   We have countless learned articles and books on a multitude of movements and tendencies written from different political and aesthetic standpoints.

64.   Who dumped all these books on my desk?

65.   The numerous books on his shelves attest to his broad range of interests.

66.   This argument was originally put forward by Aristotle in his book on ethics.

67.   Do you have any books on India?

68.   In the school library he hunted out books on politics.

69.   Over the page you can read all about the six great books on offer.

70.   ...the author of a book on politics.