Ghost of a Chance — Simon R. Green

The Carnacki Institute exists to Do Something About Ghosts. Lay them to rest, send them packing, or kick their nasty ectoplasmic arses with extreme prejudice...

The Institute's operatives are the best of the best. JC Chance: sharp, brave, charming, and almost unbearably arrogant; Melody Chambers: science-geek techno-wizard extraordinaire who keeps the antisupernatural equipment running smoothly; and Happy Jack Palmer: the telepath with the gloomy disposition, the last person anyone would want navigating through his head.

Their current assignment: investigate a major haunting deep underground at London's Oxford Circus Tube Station. Difficult -- and dangerous -- enough without the added interference of a pair of agents from the infamous Crowley Project whose mission is much simpler: eliminate Chance, Chambers, and Palmer, whatever the consequences...