Something by Mike Burrows on bike design. Interesting, but in an academic way. Though he has got me thinking I should have a 3 wheel recumbent in the stable.
Which, now I think of it, might be the point of the book.
And 'The Ascent of Money'. Which makes me go 'Hmm?', and 'ARRRGH!', often on the same page.
And finally, the Cyclist's Companion, quite the most sensible thing anyone anywhere has ever put together.