A boat passes in the night. A man dies before he can talk. And six full locks tell a story nobody else can read.
At seventy-eight, Thurstan Pickersgill is starting again. His lock cottage has been sold to a developer, his belongings are packed into tea chests, and his first night aboard his late wife's narrowboat is proving cold and sleepless.
Then, beneath the Bonfire Night fireworks, he hears an engine climbing the flight. An old engine, with a distinctive missing beat.
It stops at Lock Nine.
By morning, retired surveyor Desmond Tetley is dead in his armchair at the Toll House, poisoned by too much of his own heart medicine. The doctor suspects a muddled pill box. The police see an elderly man's mistake.
But Tetley had asked to speak to Thurstan about "a professional matter that has waited too long".
Now that conversation will never happen.
Thurstan has spent fifty-four years learning what the canal can tell him. Six locks standing full at dawn mean a boat came up during the night-and never went back down.
With the Monday Puzzle Club squeezed into his cabin, his grandson searching the bonfire ashes, and his daughter offering a spare room he is too proud to accept, Thurstan must discover who made that journey and what Tetley meant to reveal.
He has two days and two foggy nights before the evidence sails away.
Night Passage at Lock Nine is Book Three in the Monday Puzzle Club Mystery series-a warm, witty mystery of unwelcome new beginnings, old loyalties and a town with a very long memory.
A clean cozy mystery with a complete fair-play solution, no graphic content, no explicit scenes and no bad language.