Many thanks to @paullawleyjones for putting me on to shelfari.com and pointing out that it is available as an embeddable widget.
I plan to record all my reading in 2015 on this page and so avoid that terrible mental blank that can descend when someone asks me what I've just read!
<div id="ShelfariWidget263576"><a href='http://www.shelfari.com/'>Shelfari: Book reviews on your book blog</a><script src="http://www.shelfari.com/ws/263576/widget.js?r=98653" type="text/javascript" language="javascript"></script></div><noscript><ul><li><a href="http://www.shelfari.com/books/35939428/No-Fixed-Abode?widgetId=263576">No Fixed Abode</a> by Charlie Carroll</li></ul></noscript>