Megan and Henry, an English couple visiting a mutual acquaintance in Spain on a sweltering day in 1930, occupy the opening pages of “The Eighth Detective” (Holt, 289 pages, $26.99), debut novelist ...

(This program is no longer available for online streaming.) Revisit "The Great Math Mystery," fresh from the archives and just nominated for an Emmy Award. Join NOVA on a mathematical mystery tour—a ...