The "Carol Reed" series might fit the bill.
They are murder mysteries using a simple and straightforward format.
The puzzles are not mind boggling.
And the games are all set in the beautiful country of Sweden
•Cold Case Summer
•Time Stand Still
****•East Side Story
•Hope Springs Eternal
****[East Side Story
, if I remember correctly, does have one moment where a fast reaction is required - and the game also benefits from a patch. But I think it's the only one of the series where such a moment occurs.]