Possible Clues:

• Graphical symbol often loosely referred to as a smiley
• Sideways face, often
• Screen symbol expressing feeling
• Take up book by one criminal with a smiley face
• Smiley is one
• Returned volume I am studying that graphically conveys feeling
• Keystrokes simulating a face, often
• Eg, a smiley
• Facial expression created by characters in electronic message
• Revolutionary book leading study involving current symbol of modern communication