To make a button, I ended up using Adobe Photoshop CS2 on my Macbook rather than internet-based tools. I like how everything turned out for the most part:
I need to get a better and more book-related image eventually both in terms of the button and my banner. Ah well. I found it useful to learn how to do the coding for a text box, and all of this will also come in handy when I decide to make some Reading Challenges of my own later in the year. Ole!