Hanging on to this one. Learned about Cystic Fibrosis patients and the percussion technique (gently slapping the ribs in back to help release mucus and help patents to cough).

My Dad broke his collarbone and was in too much pain to cough up an enormous loogie and I was all distressed, fluttering around wishing I could help. Suddenly I remembered this book, gave his back a couple of pats, and voila! My patient, free of the offending wad of mucus, was resting comfortably and I felt like a super heroine from the library.