The moment the motor turned off, I was hooked.It was 20 minutes into my first Swedish sailing trip on a blazingly sunny morning in late June. I’d set sail with two friends from their summer house on Kilholmen, a wooded islet in the central archipelago, about an hour by bus (then a five-minute boat ride) from Stockholm. After motoring through a narrow waterway, past smooth, rounded cliffs backed by pine forests and the occasional red timbered cottage, we entered a wide-open bay, steered the bow into the wind and raised the sails. When the puttering motor was cut, it was suddenly quiet, just the wind in my face and the sparkling archipelago all around.The sheer magnitude of Stockholm’s archipelago is astounding. Shaped like a fan spreading out from the capital into the Baltic Sea, this wate...