Entertaining letters written by Tolkien for his children. Out of these type of activities grew his masterpiece - THE LORD OF THE RINGS. He wrote these stories for his children, whilst involved with the more serious work of his mythology. But the culmination of his children's fiction - THE HOBBIT, was so successful that it was published and Unwin wanted a sequel.
That said, these letters are good, and on the same quality as ROVERANDOM and FARMER GILES. Both of those are abundant in word play. These are fascinating, and good holiday stories. The chief complaint I have with these are they were not all published. As I understand it, some of the letters that are published are lacking the entire letter. However, the selection of 1925 to 1939, although for some reason it seems I read it continued on to 1945. That might be in error. The letter in 1920, only a note, is included in facsimile, but for some reason the letters of 1921 to 1924 are missing. A severe misfortune. However, if you are looking for light holiday fare (all of his children's fiction is light fare, with the possible exception of THE HOBBIT), this is the place for it. Afterward, read ROVERANDOM and FARMER GILES OF HAM. Narnia is better than both, of course.