https://en.wikipedia.org/wiki/Penguin_Great_Ideas
Series One (2004)
All books in this series, published 9 February 2004, have red spines.
01. On the Shortness of Life - Seneca
02. Meditations - Marcus Aurelius
(Missing) 03. Confessions - Augustine
04. The Inner Life - Thomas à Kempis
05. The Prince - Niccolò Machiavelli
06. On Friendship - Michel de Montaigne
07. A Tale of a Tub - Jonathan Swift
08. The Social Contract - Jean-Jacques Rousseau
09. The Christians and the Fall of Rome - Edward Gibbon
10. Common Sense - Thomas Paine
11. A Vindication of the Rights of Woman - Mary Wollstonecraft
12. On the Pleasure of Hating - William Hazlitt
13. The Communist Manifesto - Karl Marx and Friedrich Engels
(Missing) 14. On the Suffering of the World - Arthur Schopenhauer
15. On Art and Life - John Ruskin
16. On Natural Selection - Charles Darwin
(Missing) 17. Why I Am So Wise - Friedrich Nietzsche
18. A Room of One's Own - Virginia Woolf
19. Civilization and Its Discontents - Sigmund Freud
20. Why I Write - George Orwell
Series Two (2005)
All books in this series, published 25 August 2005, have blue spines.
21. The First Ten Books - Confucius
22. The Art of War - Sun Tzu
(Missing) 23. The Symposium - Plato
24. Sensation and Sex - Lucretius
25. An Attack on the Enemy of Freedom - Cicero
26. The Revelation of St John the Divine and The Book of Job
27. Travels in the Land of Kublai Khan - Marco Polo
28. The City of Ladies - Christine de Pizan
29. How to Achieve True Greatness - Baldesar Castiglione
30. Of Empire - Francis Bacon
(Missing) 31. Of Man - Thomas Hobbes
32. Urne-Burial - Sir Thomas Browne
33. Miracles and Idolatry - Voltaire
34. On Suicide - David Hume
35. On the Nature of War - Carl von Clausewitz
36. Fear and Trembling - Søren Kierkegaard
(Missing) 37. Where I Lived, and What I Lived For - Henry David Thoreau
38. Conspicuous Consumption - Thorstein Veblen
(Missing) 39. The Myth of Sisyphus - Albert Camus
40. Eichmann and the Holocaust - Hannah Arendt
For an example of the going price:
https://www.bookfinder.com/search/?author=&title=&lang=en&isbn=97801410…
