27 (or Twenty-Seven) is an opera by composer Ricky Ian Gordon and librettist Royce Vavrek in a prologue and five acts that explores the relationship of Gertrude Stein and Alice B. Toklas, and the salons that they hosted at their residence at 27 rue de Fleurus in Paris.

"[9] In her review for the St. Louis Post-Dispatch, Sarah Bryan Miller called the work "serious fun" praising Gordon's creation of "hummable tunes and recurring themes, drama and sweetness, in a well-wrought score.

Royce Vavrek, the librettist, taking his cue from Stein's own short phrases and cells of text, created a playful, quick-witted libretto that pushed Mr. Gordon beyond his trademark melodies into a brighter, friskier style.

"[12] Critic Scott Cantrell of The Dallas Morning News wrote that "27 is an unabashedly populist treatment of a yeasty artistic period, in musical idioms that wouldn't have raised an eyebrow in 1920s Paris,"[13] and further described Gordon's score as "tuneful, Frenchified neoclassicism" likening it to the work of Lennox Berkeley and Aaron Copland.

(Lynn Venhaus, Belleville News-Democrat)[15] Ann Midgette of The Washington Post noted "Daniel Brevik, bass-baritone, was particularly impressive with a sonorous voice that made him sound a bit like a young Blythe, and a build and manner so perfectly evocative of Hemingway that I, at least, was waiting for his turn in that role even while he was playing a stentorian Matisse.