Very English mystery novels

"Truth is rarely pure and never simple...Selchester Castle in 1953 sits quiet and near-empty, its corridors echoing with glories of the past. Or so it seems to intelligence officer Hugo Hawksworth, wounded on a secret mission and now reluctantly assuming an altogether less perilous role at Selchester. The Castle's faded grandeur hides a web of secrets and scandals--the Earl has been missing for seven years, lost without a trace since the night he...