First I would like to state for the record that this pattern is based on something I saw in a book or online several years ago. I wish I could remember where so I could share the credit. This pattern is for a great little notebook which can be refilled with new pages when the original pages are full. This is why I think these little notebooks are a great idea for letterbox log books. Cut a 12" x 12" sheet of plain cardstock into three pieces: one 3" x 12" and two 3" x 10-1/4". Score each piece at 2", 4", 6", 8" and 10". If you would like your books to be bigger than cut the paper to the width you would like but the length should remain the same. Apply the adhesive of your choice on the two 1/4" tabs created when you scored the 3" x 10-1/4" pieces of cardstock. I like to use a multi-media glue but double-sided tape would work well. Fold the finished accordion at the scores and set aside...