'Metamorphosis is the second Zac Tremble Case File in the series Zac Tremble Investigates; the case files of the gay, Soho-based PI Zachary Tremble.

'Metamorphosis' follows 'Chrysalis', our introduction to Zac and his slightly 'tongue in cheek' world. Zac is investigating 'Metamorphosis', a patent dispute between rival, octogenarian inventors. Missing grandson, 'Neville', provides the clue, but he's flown the nest. Zac is also pursuing the missing heir to the 'Porter' fortune. Like always, it leads to some 'interesting and unexpected' sexual encounters, and he meets George! Elizabeth's upgrade of the agency continues unabated and Mrs Chan is poorly, resulting in a trip to the vet, the delectable 'Harry', and the removal of a dongle 'in the wrong port' brings more than tears to her eyes. It all ends pretty well, especially for Zac, who gets a holiday, a boyfriend and a nice little payoff from Matt's firm.

The Zac Tremble Case Files are a barely plausible, sometimes farcical, occasionally operatic journey through Zac's world; his highs and lows, successes and failures and the emergence of one of the most touching (and funny) love affairs in PI history (do PIs fall in love?).