Hey Timer000
All you need to do is at the top of the forum, under the Cards tab, select spellbook builder.
That will open up a separate tab allowing you to create a spellbook.
If you follow the instructions in this forum topic:
http://forum.arcanewonders.com/index.php?topic=13225.0it will tell you how to use the options in the spellbook builder.
When you are done, there is a button at the top that says Export. Under that tab, there is a selection for Forum Code.
Once selected, it will give you a list of text that has the spellbook you worked on. You just copy the text and paste that into a forum post that you are posting and when you press Preview on the post, it should show up with the card names with links to the images and the yellow scroll background.
I hope that helped.