Papers for Bookmaking

I want to make my own watercolor sketchbook using traditional bookmaking techniques.
I’m really looking forward to getting creative with it! What paper do you recommend using for this purpose?

Artists tell us they love using our 500 Series Aquarius II® Watercolor paper for bookmaking. This unique cotton/synthetic blend of watercolor paper resists buckling so it doesn’t need to be stretched. It is also lighter weight (80 lb) compared to traditional watercolor sheets (140 lb) so it’s easier to work with when cutting and binding books.  The finish is smoother than traditional watercolor which makes it an excellent mixed media sheet.