31.   When Ted was a kid, he read every book about space that he could get his hands on.

32.   Before the trip, Emma went to the library and skimmed through a book about Paris.

33.   The books about Harry Potter are very popular now, both at home and abroad.

34.   Her books about her adventures give enjoyment and inspiration to armchair travellers.

35.   ...the only book specifically about that event.

36.   Sooner or later most writers end up making books about the torments of being a writer.

37.   There was a firm rubric in the book about what had to be observed when interrogating anyone under seventeen.

38.   She wrote a book about car care.

39.   Where can I find books about gardening?

40.   A book about some of the most famous people of the last century.