Description from the back cover:

Two boys are growing up in wartime London. One is Martin, a lonely, swottish only child. The other is Dovidl, a brilliant young refugee violinist from Warsaw. Blood-brothers, they roam the ruined city, finding tragedy and triumph, sex and crime.
Then Dovidl disappears, on the afternoon of his internationla debut. Martin is broken-hearted, his father near-bankrupt, the police mystified. Where has he gone? Martin is condemned to forty years of humdrum half-life, until, one wintry night, an unexpected musical clue sets him on a trail to an astounding act of self-discovery and renewal.

Sent to Stevie in Newry this morning.

Thanks yet again, looking forward to this read, another great swap from Wales to N.Ireland..