The following is a complete list of George MacDonald’s books that are available for free in PDF format from the Internet Archive. Abridged titles are given in parentheses.

1. Adela Cathcart, containing “The Light Princess”, “The Shadows”, and other short stories
2. Alec Forbes of Howglen (= The Maiden’s Bequest)
3. Annals of a Quiet Neighbourhood (★★★★★)
4. At the Back of the North Wind
5. Beautiful Thoughts from George MacDonald (compilation)
6. Cheerful Words from the Writing of George MacDonald (compilation)
7. David Elginbrod (= The Tutor’s First Love)
8. Dealings with the Fairies, containing “The Golden Key”, “The Light Princess”, “The Shadows”, and other short stories
9. Diary of an Old Soul (★★★★)
10. “The Disciple” and Other Poems
11. A Dish of Orts (essays)
12. Donal Grant (= The Shepherd’s Castle), a sequel to Sir Gibbie
13. Dramatic and Miscellaneous Poems
14. The Elect Lady (= The Landlady’s Master)
15. England’s Antiphon (a history of religious poetry)
16. Far Above Rubies
17. The Flight of the Shadow
18. The Gifts of the Child Christ and Other Tales (= Stephen Archer and Other Tales)
19. Guild Court: A London Story (= The Prodigal Apprentice)
20. Gutta Percha Willie, the Working Genius (= The Genius of Willie MacMichael)
21. Heather and Snow (= The Peasant Girl’s Dream) (★★★)
22. “A Hidden Life” and Other Poems
23. Home Again: A Tale (= The Poet’s Homecoming)
24. The Hope of the Gospel (★★★★)
25. Lilith: A Romance
26. Malcolm (updated under the same title)
27. The Marquis of Lossie (= The Marquis’ Secret), the sequel of Malcolm (★★★★)
28. Mary Marston (= A Daughter’s Devotion or The Shopkeeper’s Daughter)
29. The Miracles of Our Lord (sermons) (★★★★★)
30. Paul Faber, Surgeon (= The Lady’s Confession), a sequel to Thomas Wingfold, Curate
31. Phantastes: A Fairie Romance for Men and Women (★★★)
32. The Portent
33. The Princess and the Goblin (★★★★★)
34. The Princess and Curdie, a sequel to The Princess and the Goblin (★★★★★)
35. Rampolli: Growths from a Long-planted Root
36. Ranald Bannerman’s Boyhood (= The Boyhood of Ranald Bannerman)
37. Robert Falconer (= The Musician’s Quest) (★★★★★)
38. A Rough Shaking (= The Wanderings of Clare Skymer)
39. St. George and St. Michael
40. Salted with Fire (= The Minister’s Restoration)
41. Scotch Songs and Ballads
42. The Seaboard Parish, a sequel to Annals of a Quiet Neighbourhood (★★★★★)
43. Sir Gibbie (= The Baronet’s Song) (★★★★★)
44. Thomas Wingfold, Curate (= The Curate’s Awakening) (★★★★★)
45. There and Back (= The Baron’s Apprenticeship), a sequel to Paul Faber, Surgeon (★★★★★)
46. The Threefold Cord: Poems by Three Friends
47. The Tragedie of Hamlet, Prince of Denmarke: A Study With the Test of the Folio of 1623
48. Unspoken Sermons (1st series, 2nd series, 3rd series) (★★★★★)
49. The Vicar’s Daughter, a sequel to Annals of a Quiet Neighborhood and The Seaboard Parish
50. Warlock o’ Glenwarlock (= Castle Warlock and The Laird’s Inheritance)
51. Weighed and Wanting (= The Gentlewoman’s Choice) (★★★)
52. What’s Mine’s Mine (= The Highlander’s Last Song)
53. Wilfrid Cumbermede
54. The Wise Woman: A Parable (= “The Lost Princess: A Double Story” or “A Double Story”)
55. Within and Without: A Dramatic Poem
    

Although all of George MacDonald’s works are out of copyright, this list does not include everything he has written. If you want a more complete list, you can check out our Complete Bibliography of George MacDonald.