5- The Tricky Part: So now you are going to actually sew all of your pages together using the rag paper to hold them together; doing so one booklet at a time. Start out with the 'good' side of your paper facing out with the tracing paper outside of it. Then line the booklet up with the rag paper, the tricky part being that you want to actually line the spine of your booklet to a space about 1/4 inch away from the center, so that as you sew each individual booklet in, they are equal distance from the center.
[Side Note: I feel like I should let you in on a lil secret... I am super NOT a perfectionist. I am all about just holding things together to see how they fit, or using a ruler to rip rather than cut paper... I am the queen of, 'I'll just eyeball it.' I've been sewing my own clothes for years, and I usually just hold stuff up to me and guestimate or upcycle or whatever. I personally love the warm feel of handmade, yet high quality, perfectly imperfect goods... so measure at your own leisure. (Ha! Off the cuff but I think it's my new mantra!)]