In strict taxonomic terms, Roger Longrigg’s long career – he published novels for over half his seven decades on the planet – looks like a throw-back, a reversion to the high-output conditions of the inter-war era when, as Alec Waugh once put it, ‘a book a year was the rule’. Certainly a professional bibliographer called in to reckon up his prodigious output would hardly know where to start. To begin with there are the dozen novels written in the ’50s and ’60s under his own name – gamey and somewhat louche affairs, including the horse-racing caper Daughters of Mulberry (1961). Then there are the psychological thrillers from the 1980s, most notably Mother Love (1983), under the alias ‘Domini Taylor’.