Shelfari.com is a free site that lets you keep track of what you're reading. Other similar sites are GoodReads.com and LibraryThing.com (used at Groves quite a bit).

Check the terms of service - LibraryThing requires users to be 13 years old; I am not sure about GoodReads.com or Shelfari.com.

How to Embed a Shelfari Shelf into a Wikispaces Page



One of Shelfari's features is that you can visually "display" books you've read or are reading onto a digitally-rendered "shelf" on your blog. Getting that shelf to appear on your wiki page, however, is a bit trickier. Here's what worked for me after creating an account and inputting some titles.
1. Pick PROFILE TAB -> MY SHELF
2. Scroll down until you see the PUT YOUR SHELF ON YOUR BLOG button along the left margin.
3. Two options for this step:
a. If you have made a widget on the account before, you’ll see your existing embed code but a button that says CREATE NEW WIDGET below. Click that. You’ll be sent to the Widgets page.
b. If you have never made a widget on the account below, you’ll be sent to the Widgets page.
4. Now you’re on the Widgets page. Click the blue SELECT YOUR WIDGE TYPE MANUALLY.
5. Now you see a bunch of icons. Click the red FL button at the bottom of the list.
6. You’ll be sent to the CUSTOMIZE AND INSTALL YOUR WIDGET page.
a. In the left column, customize your settings as needed.
b. In the right column, you’ll see a preview of your widget. Above it, copy the embed code in the box.
7. Go to your wiki page.
8. Click EDIT THIS PAGE.
9. Click the WIDGET button.
10. Click OTHER HTML from the left list of options.
11. PASTE the embed code into the box.
12. Click SAVE to save the page.
13. Voila – it should show up!
14. My sample here: http://staffdev.wikis.birmingham.k12.mi.us/Shelfari+test


PS - Are you a LibraryThing user? Embedding instructions are here.