Clouds of Witness
by Dorothy L. Sayers (T. Fisher Unwin, 1926); audiobook read by Ian Carmichael (BBC, 1992/2009)
An unhurried mystery from which the protagonist seems oddly removed. Lord Peter Wimsey is a character cut from the Wodehouse mould, yet the writing—despite its occasionally witty turn of phrase—leaves him untethered, a whimsy (as it were) without true purpose.