I understand as my daughter needed very little sleep from infancy and still doesn't aged 46!
In addition to the suggestions above I would have thought he would enjoy any of the Michael Morpugo books for older children, e.g. War Horse, Kensuke's Kingdom.
You might try the Cressida Cowell dragon books, e.g. 'How to Train your Dragon'. There are about 10 in the series.
'Goodnight Mr Tom' by Michelle Magorian is another good story.
There are kindle editions of many titles now.
Ginny42 Thu 21-Jan-16 12:19:04
Imperfect27 Thu 21-Jan-16 08:30:28
annodomini Wed 20-Jan-16 21:25:13
Hepopal Wed 20-Jan-16 21:20:16