For the table of contents, check at the bottom of this post below the image.
The book is available at the Internet Archive, Sacred Texts, Hathi Books, and Google Books. There's also a free audiobook from LibriVox.
King Arthur
The Drawing of the Sword
The Questing Beast
The Sword Excalibur
The Story of Sir Balin
How the Round Table Began
The Passing of Merlin
How Morgan le Fay Tried to Kill King Arthur
What Beaumains Asked of the King
The Quest of the Holy Graal
I: How The King Went on Pilgrimage, and his Squire was Slain in a Dream
II: The Coming of the Holy Graal
The Adventure of Sir Galahad
IV: How Sir Lancelot Saw a Vision, and Repented of His Sins
V: The Adventure Of Sir Percivale
VI: An Adventure of Sir Lancelot
VII: An Adventure of Sir Gawaine
VIII: The Adventure of Sir Bors
IX: Adventure of Sir Galahad
X: Sir Lancelot Meets Sir Galahad, and They Part For Ever
XI: How Sir Galahad Found The Graal And Died Of That Finding
The Evil Days of Arthur
The Fight for the Queen
The Fair Maid of Astolat
Lancelot and Guenevere
The End of it All