What book should I use to sign my idol?
If you use a notebook, use loose-leaf paper. It's easy to disassemble. It's better to use a thicker one. If you use a pen, you'd better use a carbon pen, because carbon molecules are relatively stable and easy to store. If not, you can use a black pen, which also contains carbon. Otherwise, you can sign your name on clothes or magazines with idol reports. Haha ~