I know there are a lot of clever clogs - ahem, I mean, erudite people - here, so see how you get on with this:
http://caboodle.nationalbooktokens.com/hiddenbooks/default.aspx?competition=10
Got 17, stuck for the last three.
http://caboodle.nationalbooktokens.com/hiddenbooks/default.aspx?competition=10
Got 17, stuck for the last three.