How many suns are there in a star system?

The strange world of Denthan, which Paul Murdoch has created for The Peck Chronicles adventures (9+), has 2 suns shining down on it. Unusual? Apparently not. As Bill Bryson explains in his brilliant A Short History of Nearly Everything: ‘Most star systems in the cosmos are binary (double-starred), which makes our solitary sun a slight oddity.’ So there you go. Once…