These are really nice, with an air of olden-days Penguins to them. I just hope that this bit...
..is a sticker, or else you'll be permanently stuck with that unfortunate link to the middle bits of the most drawn-out case of milking it in cinematic history.
The other series are these elegant new editions of the G. K. Chesterton Father Brown books:
These take inspiration from Romek Marber's old Penguin Chesterton crime covers, especially in the case of 'The Incredulity...' (old) in 'The Innocence...' (new):