The order is crucial for the overarching mystery of the Arnot case and the corruption in the Sureté. It unfolds across several books, especially from 'The Brutal Telling' through 'How the Light Gets In'. So, list time: 'Still Life', 'A Fatal Grace', 'The Cruelest Month', 'A Rule Against Murder', 'The Brutal Telling', 'Bury Your Dead', 'A Trick of the Light', 'The Beautiful Mystery', 'How the Light Gets In', 'The Long Way Home', 'The Nature of the Beast', 'A Great Reckoning', 'Kingdom of the Blind', 'A Better Man', 'All the Devils Are Here', 'The Madness of Crowds', 'A World of Curiosities'.
If you read out of order, that multi-book arc will be spoiled and lose its impact. Treat it like a TV series with season-long plots.