Eric: If nothing comes of your efforts to repatriate the books to Ron's family then perhaps give someone at GAPAN a call. Some of the Colonel's memorabilia is kept in their library and they may be willing to act as custodians of the logs until someone claims them. If no one claims them then at least they will serve as an interesting piece of reference material.
If GAPAN can't help then try the RAeS (who
AFAIK) also have some of the Colonels' memorabilia.
If
they can't help then try asking PPRuNer
Heli1 if the Helicopter Museum in Weston-super-Mare are interested.
Speaking of museums .. there are currently plans for a new rotary museum in
Durham.
Brgds