It's London during the Blitz, and PI Johnny Hawke's new client wants him to find out if husband Walter is having an affair and, if so, to get the proof so she can divorce him. Business is thin and sometimes a guy must do the dirty work, so he takes the case. Soon he finds that Walter is part of a flourishing London transvestite scene; but then, almost immediately, Walter is murdered in the street. Despite the client being intimidated into sacking him from the case, Johnny persists with his investigation.
Meanwhile, he has to deal with the problem of Peter, a child who's fixated on him and who has run away from his fosterparents to try to find Johnny in London. And, if that weren't enough, he's drawn into the case of Harryboy Jenkins, a sociopath who's robbing and murdering his way across the war-devastated city, dragging along in his wake the luckless young woman who thought that being with him might be "exciting" . . .
The book's very lightly and sprightly written, and I have no quibbles about its readability. The characters seem real enough, especially Rachel, the naif whom Harryboy has decided is his property. The suspenseful moments are handled neatly. There are some nattily Chandleresque one-liners. And so on.
But, oh churl that I am, I have quibbles.
(1) The final stretch of the book, while genuinely packing a thrill, depends upon a coincidence so long that I felt my lip curling as soon as it was introduced.
(2) Only on rare occasion did I notice that the novel was set in wartime London. I'm sure that, had one been living there, the daily matter of the bombing and the other privations of war would seldom have slipped from one's mind. Yet the main characters (Harryboy excepted, because he's exploiting the situation) most of the time seem barely aware of the backdrop against which they're playing their play. This lack of sense of place did bother me quite a bit.
(3) The text is littered with hundreds of trivial errors of punctuation, grammar, etc. -- the type of stuff that, back in the day, a copyeditor would have tidied up . . . and, if s/he didn't, then the proofreader would. At worst (maybe half a dozen times), this had me having to pause to parse a sentence to extract its meaning; aside from such instances, the carelessness of usage was an unremitting irritant throughout. And there's the delight, on page 41, of a character being introduced as "my brother Edward" and then, by the bottom of the page, having the name "Captain Michael Eddowes" instead.
I guess the nearest comparison within my reading experience must be the Bernie Gunther series by Philip Kerr, of which I've read the first three. I'd say Without Conscience measures up very favorably to the first of those, moderately well to the second, and struggles a bit when matched against the third. Even so, should another Johnny Hawke story drift in my direction, I might very well pick it up. Davies does score highly on readability.