Sometimes I see only pictures of journals on the web and then try to figure out how they were made. This is one of those journals.
Basically this journal is made with one sheet of watercolor paper folded in half length wise and then folded in half width wise. Then the half is folded one more time, giving 8 sections, each section is 3" x 4.5".
Next the watercolor paper is cut on the center line (not the entire length). Once that is done, the watercolor paper is folded in half length wise with an opening in the middle section of the journal.
Pressing the left and right in creates journal.
With this type of journal, I can sketch or write notes on both sides of the paper.