Mahir Salih 
The Return of the Salmon [EPUB ebook] 

When Kalid turns his back on his English upbringing and
his family and joins IS to fight for his religious beliefs, will
he find the fulfillment he is searching for?
Bereft at the loss of their only son, his parents, Hamid
and Ayla follow Kalid to Iraq, intent on finding him and
persuading him to return to the safe environment of family
life in London. But how difficult will their task be?
The heartbreaking story of a family split by war, cultural
and religious beliefs.