In making my first journal, I suddenly decided to do one of those with close with a magnet. I'm ridiculously proud of it, considering how easy it was. (click on any picture to see it bigger)
The pages extend past the cover because i badly wanted to use that fabric but didnt have very much. I actually ended up being glad of that in the end, since i love how it turned out.
All I did to make it was use this wonderful coptic stitch tutorial:http://personal.mem.bellsouth.net/d/r/drv1913/0204.html
Now if you go there and scroll down a bit, you may notice where it says in big bold letters: "If this is your first time making a book, I would strongly advise against using any sort of thick paper such as watercolor paper or heavy drawing paper." Right, I definitely disregarded that and used cardstock. Which was, admittedly, must harder than the one i made with normal paper later...but cardstock was all i had at the moment. Plus i rather like how it turned out much thicker than one made with thin paper.
Anyway. To make the extra flap i simply cut another piece of cardboard the same size as the spine and then a piece for how big i wanted the flap. I glued magnet #1 to the front cover cardboard, glued the front cover, spine, back cover and other "spine" to the fabric (using tacky glue), then put the remain piece of cardboard on top of the front cover, put some tacky glue on the magnet, and let it stick so it was on top of the other magnet (I had some very
strong magnets...) then glued the last piece to the fabric!
Glue a paper over the flap..
glue the front and back pages to the cardboard, and voila! Beautiful journal. I gave it to my cousin for Christmas, she loved it