The Expression of the Emotions in Man and Animals, by Charles Darwin (London, 1915), in 401 bookmarked and searchable pdf pages, with many unforgettable illustrations. This classic work, originally published in 1872, deals with the biological aspects of emotional life. It seeks to explain your emotions, those of your pets, and of wild animals.  It may even make you laugh, and lift your spirits--though this probably was not Darwin's intention. A Wikipedia entry ("The Expression of the Emotions in Man and Animals") describes the work's history and influence.  Book digitized by Google and compiled by Robert Bedrosian.Contents: Chapters 1-3.  General Principles of Expression; 4. Means of Expression in Animals; 5. Special Expressions of Animals; 6. Special Expressions of Man: Suffering and Weeping; 7. Low Spirits, Anxiety, Grief, Dejection, Despair; 8. Joy, High Spirits, Love, Tender Feelings, Devotion; 9. Reflection, Meditation, Ill-temper, Sulkiness, Determination; 10. Hatred and Anger; 11. Disdain, Contempt, Disgust, Guilt, Pride, etc., Helplessness, Patience, Affirmation, and Negation; 12. Surprise, Astonishment, Fear, Horror; 13. Self-attention, Shame, Shyness, Modesty, Blushing; 14. Concluding Remarks and Summary.