Doctor Who: The Adventuress of Henrietta Street (Eighth Doctor Adventures, #51)

Time, according to the more arcane elements of quantum theory, is dependent on a consciousness, an observer, for its existence. At the outer reaches of the universe, where human consciousness cannot reach, time goes 'soft', and it is here that mankind meets its own animal and subconscious limitations, in the form of the brutal, carnivorous baboon-like beast.