A Dagger Through the Heart: Photo Finish (Ngaio Marsh)

Ngaio Marsh. Photo Finish (1980) The Diva La Sommita dies of a stab wound impaling an unflattering photo of her. Alleyn happens to be on site (a mansion newly built for her on an island in a New Zealand lake). Troy had been engaged to paint La Sommita's portrait. The house party had been invited to witness the world premiere of a (bad) opera written by La Sommita’s latest lover, a star-struck boy of some but insufficient talent. That, along with old loyalties and buried jealousies and resentments, as well as a series of unflattering photos published by a pseudonymous paparazzo, provide the necessary complications.
     A late entry in the Alleyn cycle, well plotted, characterised, and written. Marsh by this time was an old hand at confecting murder mysteries, and it shows. She allows herself room for miscellaneous satire and sharp social commentary. Average for her, which makes it above average for the genre. ***

Why Right and Left are (almost) indistingushiable.

  Martin Gardner. The New Ambidextrous Universe (rev. ed. 1990) A revised version of what  Gardner understood of physics in 1990. He acknowledges the book is outdated (evidence for the Higgs boson has since been found, for example), but it’s still a good overview of the Standard Model and its implications. The title refers to the arbitrariness of the terms Left and Right. Our usage is purely conventional. Without a face-to-face encounter, even a picture can’t define the convention, since one has to know it in order to reproduce the picture right (!) way round. That would severely limit attempts to communicate with aliens. Left-right happens to be a necessary category of symmetry, without which theories of physics don't make sense.

    Gardner writes well and clearly, with a sly wit that sometimes breaks through his earnestness. One does need at least a high school knowledge of physics to grasp some of the explanations, but the central thesis is accessible to anyone.

     Oh, about "almost indistinguishable": I don't understand it, but it seems to have something to do with C-parity. Clarifications and corrections desired.

    Recommended ****

Fear and its effects (Laphams's Quarterly 10-3)

 Lapham’s Quarterly 10-3: Fear (2017) Fear messes with one’s brain. Attempts at rational thought fail. Individually, we may panic, and fail to do what’s needed to avoid danger. Socially, we may turn on those we believe endanger us, and commit the most appalling cruelties. Politicians know this, and stoke fear in order to achieve power. Create an image of some danger, then present yourself as the only one that can and will defend against it, that’s a sure way to impose one’s will on others. This collection is heavy on the political, but includes phobias, superstitions, and fear as entertainment. The latter may help to inoculate against panic, but the data are ambiguous.
Another fine collection. ****