Irvine Welsh's Skagboys is the concluding part (we assume) of his most epic and well-known tale - that of the heroin addicted, psychopathic Edinburgh friends Renton, Sickboy, Spud and Begbie.
Above all else it's truly a novel for Welsh's fans - those who can't get enough of the gang they first met in Trainspotting 20 years ago, for whom the idea of a prequel is, well, jist pure barey Catboy, ken?
To mark its release, we've put together a fiendish quiz that encompasses Welsh's novels, short stories and his own life to separate the part-time fans from the true die hards.
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Naturally, it contains some bad language. Good luck...