Seconding the mass market angle: try Agatha Christie (And Then There Were None or The ABC Murders), Harlan Coben (Tell No One or The Stranger) and Shari Lapena (An Unwanted Guest) for twisty, fair, fast reads usually under 350 pages. If you want clever reveals without bloat, Keigo Higashino’s Malice or The Devotion of Suspect X are lean and addictive in paperback. For ultra-short bites between gates, a Sherlock Holmes or Maigret short-story collection gives you one case per boarding group.
