The Dream Room by Marcel Moring
Translated from the Dutch by the author

So, David devises a plan - and before the day is over the whole family is at home, putting model aeroplanes together for the toyshop owner to sell. A long, rainy Dutch summer ensues, in which mother, father and son work alongside each other. They've never been so close, never felt so secure. Then one night, David hears his father's voice, full of surprise, and the next morning there's a visitor at the breakfast table, Humbert Coe, an old wartime friend. The unexpected arrival of this charming and worldly man revives old feelings of loyalty, love and hatred - and ensures that nothing will ever return to a perfect state again. A warm, funny, elegiac story of a family's journey from innocence to experience.