News just coming out about this American edition... likely quite similar to the deluxe edition from the UK that came out last year, but the description makes it sound like there will be additional material appearing for the first time.

For fans of Tolkien and lovers of Christmas holidays, Letters from Father Christmas is a gorgeous, festive gift featuring all of the letters that Tolkien created for his children, for the first time in one book along with other archival elements. Published on the 100th anniversary of the first letter Tolkien sent to his firstborn, John, in 1920, this handsome hardcover will also include an introduction from granddaughter [sic - actually daughter-in-law] Baillie Tolkien, reflecting on the centenary anniversary of the letters, as well as a personal note by Tolkien himself reproduced for the first time. link link

No image available yet.

Hardcover: 208 pages
Publisher: Houghton Mifflin (6 Oct. 2020)
Language: English
ISBN-10: 0358389887
ISBN-13: 978-0358389880

(ISBN may not be final)