The Unsolvable Case

It’s three days until Samhain, and the Undetectables are going to die. No longer taking magical cases (not that anyone would hire them), they’ve well and truly given up the ghost. Meanwhile, Theodore (the relinquished ghost in question) is on the run. Wanted in connection with the Undetectables’ last case, he’s hiding in the last place anyone would think to look, keeping secrets (badly) and forming unlikely alliances (slightly less badly). When a copycat killer emerges and history appears to be repeating itself, the Undetectables are called up for one last case. Mallory, Diana and Cornelia find themselves in a final race against the clock – but this time, the whole of Occulture is at stake.