Here’s hoping that Treehorn will make a comeback. I was saddened to learn of the death of Florence Parry Heide, whose Treehorn trilogy was illustrated by Edward Gorey.
Her best-known book, “The Shrinking of Treehorn” (1971), was about a boy whose parents paid little heed to him, even as he began getting littler and littler, unable to reach familiar shelves, watching as his clothes seemed to grow on him. Its comic, macabre plotline appealed to the artist Edward Gorey, who illustrated it and two sequels, “Treehorn’s Treasure” (1981) and “Treehorn’s Wish” (1984).

I included this book in a paper about magical transformations and I’m thinking of digging that out and revising it. I don’t recall knowing about the sequels. I must look those up.