1.) 101 American Customs
Harry Collis, Joe Kohl
McGraw-Hill; 1999
Paperback

2.) 101 American English Idioms
Harry Collis, Mario Russo
McGraw-Hill; 1987
Paperback

3.) 101 American English Idioms
Harry Collis
McGraw-Hill; 2007
Paperback

4.) 101 American English Idioms
Harry Collis, Mario Risso (illustrator)
NTC/Contemporary Publishing Company; 1996
Audio Cassette

5.) 101 American English Idioms (Teacher's Manual and Resource Book)
Harry Collis, Mario Risso (illustrator)
National Textbook Company; 1988
Paperback

6.) 101 American English Idioms w/Audio CD
Harry Collis
McGraw-Hill; 2007
Paperback

7.) 101 American English Proverbs
Harry Collis
McGraw-Hill; 1990
Paperback

8.) 101 American English Proverbs with MP3 Disc
Harry Collis
McGraw-Hill; 2009
Paperback

9.) 101 American English Riddles
Harry Collis
McGraw-Hill; 1996
Paperback

10.) 101 American Superstitions
Harry Collis
McGraw-Hill; 1998
Paperback

11.) Colloquial English
Harry Collis
Prentice Hall; 1981
Paperback

12.) Colloquial English
Harry Collis
Regents; 1981
Paperback

13.) Get With It! 101-Plus Pop Culture Idioms and Expressions
Harry Collis, Jamie Anne Cross (Eds.), Joe Kohl (illustrator)
Alta Book Company; 2008
Paperback

14.) Listen and Learn
Harry Collis, Mario Risso (illustrator)
NTC/Contemporary Publishing Company; 1992
Audio Cassette