I am looking for a children’s chapter book that I read in the mid to late 80s about a brother and sister who become trapped in the center of a conch shell and have to solve riddles in order to open up each chamber of the conch to work their way back out to freedom. I can’t remember the author or title. The title might have included words like ‘through the chamber door’ or something about a conch, not sure.
Are you thinking of The Diamond in the Window by Jane Langton? There is a part where the brother and sister, Eddy and Eleanor, get trapped in a chambered nautilus shell.
Laura, Yes!!! I have been looking into this book after I read your reply and I think that this is the book that I have been looking for! All of the descriptions sound familiar! I am so excited to purchase a copy and read it again after all of these years! It was one of the most stand-out books I read as a child! It really captured my imagination! Loved it! Thanks a million!!!
Great—I talked to my sister about it and she’s said that’s definitely the book.