The Neverending Story question

Do you know of any books written since 2017 that are similar to The Neverending Story in that they contain a book within a book, and two worlds are intertwined? I'm looking for books that are comparable to my own novel, because I need to include it in my query letter, and I was told they should be recently published books. I've been searching and searching, but I can't find any that I love (or really any at all). Suggestions appreciated!