Hi Maria
Yes, FBML is the only way to add HTML to a Tab, so that you can insert pictures (like book covers) and styling (like bold and italics).
I did use it on another Facebook Page I manage, but it was quite a while ago since I set it up, and it's one of those things that you don't tend to remember after you do it......but I did find two online tutorial pages that looked really familiar so I think that they are what I used as a guide before:
http://www.hyperarts.com/blog/tutorial-facebook-pages-with-static-fbml-application/
http://www.socialmediaexaminer.com/how-to-customize-your-facebook-page-using-static-fbml/
Also, if you're not familiar with using HTML, the easy way to add it to your new FBML Tab is to create the page in WordPress (but don't publish it, leave it as a Draft)......get it exactly how you want it with styling and images, etc., then Preview the post in your browser, then click on the "View" menu at the top of your browser bar, click on "Page Source" or "View Source" (depending on your browser), and scroll down through the HTML until you find the section you want for your Page.......copy the whole section and paste it into your FBML box and save it.
Let me know if you need more help tweaking it once you have it all in......I'm very good with HTML and probably help you with that part of it.