Supplies for creating your own books and journals are available from a wide variety of sources.
Much of what you will want for the creation of your books is available on amazon.com. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Also, particularly for paper that you will be using in the construction of your textblocks and book covers, but also for many other art materials, Blick Art Materials is a great resource, and for that reason we are also an affiliate theirs
