Collects a series of short stories featuring the literary trope of the love triangle.

Riddles in mathematics / Katie Cotugno -- Dread south / Justina Ireland -- Omega ship / Rae Carson -- La revancha del tango / Renée Ahdieh -- Cass, An, and Dra / Natalie C. Parker -- Lessons for beginners / Julie Murphy -- Triangle solo / Garth Nix -- Vim and vigor / Veronica Roth -- Work in progress / E.K. Johnston -- Hurdles / Brandy Colbert -- The historian, the garrison, and the cantankerous catwoman / Lamar Giles -- Waiting / Sabaa Tahir -- Vega / Brenna Yovanoff -- A hundred thousand threads / Alaya Dawn Johnson -- Before she was bloody / Tessa Gratton -- Unus, duo, tres / Bethany Hagen.