I thought it would be neat to have a single volume that collected all of the additional narrative pieces about the Third (and Fourth) Ages together. Sort of like the Fall of Numenor did for the Second Age.

I went through the various sources and tried to list out all of the material that would make such a book leaving off the prologues and main narratives of the Hobbit and LoTR. Although HoME has a lot of text about the writing of LoTR, I didn't feel that any of the older drafts offered additional detail or stylistic differences the way that the Book of Lost Tales does for The Simarillion.

Below is my list. What did I forget?

Silmarillion

• Of the Rings of Power and the Third Age Starting with "Thus began the Third Age of the World..."

Lord of the Rings

• Appendix A - I. The numenorean kings * ii - The Realms in Exile * iii - Eriador, Arnor and the Heirs of Isildur * iv - Gondor and the Heirs of Anarion * v - Aragorn & Arwen
• Appendix B - The Tale of Years "The Third Age" onwards
• Appendix C - Family Trees
• Appendix D - Shire Calendar
• Appendix F - Languages and Peoples of the Third Age

Unfinished Tales

Part 3
Part 4 - The Istari

HoME 6 - The Return of the Shadow

XIV Return to Hobbiton - Note 22 Bilbos Will

HoME 12 - Peoples of Middle Earth

• Part Four: Unfinished Tales - XVI The New Shadow

Nature of Middle Earth

• Part Two, VI Descrptions of Characters Fate of the hobbits
• Part Three,
  • X - Rider to the White Rider
  • XXI - From the Hunt for the Ring
  • XXII - The Rivers and Beacon Hills of Gondor

EDIT - Forgot to include
HoMe 9 -Sauron Defeated - Part One XI The Epilogue
EDIT - Adding back in Unfinished Tales references thst disappeared