For the table of contents, check at the bottom of this post below the image.
The book is available at the Project Gutenberg, Internet Archive, Sacred Texts, Hathi Books, and Google Books. There is also a free audiobook from LibriVox (for the first part of the book only).
(from the Medieval Welsh Prose page,
a very useful resource!)
The Lady of the Fountain
Llyn Dulyn in Snowdon
Peredur the Son of Evrawc
Geraint the Son of Erbin
Kilhwch and Olwen
The Dream of Rhonabwy
Pwyll Prince of Dyved
Branwen the Daughter of Llyr
Manawyddan the Son of Llyr
Math the Son of Mathonwy
The Dream of Maxen Wledig
The Story of Lludd and Llevelys
Taliesin