The Last Templar by Raymond Khoury

Never remind readers of your book of another, better book, and especially never remind them of Foucault's Pendulum, the book that destroyed all future silly historical conspiracy thrillers, particularly if your book is a silly historical conspiracy thriller.

But not long into The Last Templar, a minor character  quotes the above tome by saying that you can always tell a lunatic because '...sooner or later he always brings up the Templars.'

Bigging Themselves Up: The Culture and Consider Phlebas

Memory can be a strange thing. 

As a kid in school, Consider Phlebas, the first of the Culture novels by the Scottish Iain M. Banks, seemed quite a daunting read to me. I found it in the library at school amongst several of Banks’ other books; perhaps the blessed doing of the same unknown but thoughtful soul who stocked our book-depository with the many Sandman novels. I like to think that some well-meaning menial member of staff had sneakily inserted these books among the ranks of the Jaquiline Wilsons in an effort to prove that teenagers are capable of enjoying the more complex entertainments if given the opportunity.