Isobel Blackthorn 
Sing Like A Canary [EPUB ebook] 

Retired police officer Marjorie Pierce is on her way to Lanzarote to track down her old informer, Billy Mc Kenzie. Billy ended Marjorie’s career, and she needs an explanation; an apology.
Present and past soon collide when gangsters Eric and Mick Maloney turn up on the island with revenge in their veins, and Marjorie has to race against the clock to get to Billy before the brothers.
But who is complicit and who can be trusted… and who really betrayed Marjorie all those years ago?
A multi-layered mystery packed with suspense, Sing Like A Canary is the fifth book in Isobel Blackthorn’s Canary Islands Mysteries Series, and can be enjoyed as a standalone even if you haven’t read other books in the series.