Terry Pratchett's The truth

There's been a murder. Allegedly. William de Worde is the Discworld's first investigative journalist.

He didn't mean to be - it was just an accident.But, as William fills his pages with reports of local club meetings and pictures of humorously-shaped vegetables, dark forces high up in Ankh-Morpork's society are plotting to overthrow the city's ruler, Lord Vetinari.

They've employed two Tarantinoesque thugs, Mr Tulip and Mr Pin.

They mean business. Luckily, William has an informant. He can't be a talking dog because dogs can't talk. He's known only as...Deep Bone.