The Eyre Affair by Jasper Fforde

From chapters.ca:
The word "unique" is overused and frequently misused. Here, however, is an instance where it truly applies. But to call The Eyre Affair a unique first novel featuring a fearless fictional adventurer barely begins to tell the story. When asked to summarize his creation is a single sentence, Jasper Fforde described it as "a literary detective thriller with romantic overtones, mad-inventor uncles, aunts trapped in Wordsworth poems, global multinationals, scheming evildoers, an excursion inside the novel Jane Eyre, dodos, knight-errant-time-travelling fathers, and the answer to the eternal question: Who really wrote Shakespeare's plays?" Swindon, a traditionally tranquil English town, is the ironic setting for most of these oddball characters and peculiar goings-on; the year is 1985.