W. S. Gilbert (1836-1911) was an English librettist, dramatist, and poet. Born in London, Gilbert was raised by William, a surgeon and novelist, and Anne Mary, an apothecary's daughter. As a child he lived with his parents in Italy and France before finally returning to London in 1847. Gilbert graduated from Kind's College London in 1856 before joining the Civil Service and briefly working as a barrister. In 1861, he began publishing poems, stories, and theatre reviews in Fun, The Cornhill Magazine, and Temple Bar. His first play was Uncle Baby, which ran to moderate acclaim for seven weeks in 1863. He soon became one of London's most popular writers of opera burlesques, but turned away from the form in 1869 to focus on prose comedies. In 1871, he began working with composer Arthur Sullivan, whose music provided the perfect melody to some of the most popular comic operas of all time, including H. M. S. Pinafore (1878), The Pirates of Penzance (1879), and The Mikado (1885). At London's Savoy Theatre and around the world, The D'Oyly Carte Opera Company would perform Gilbert and Sullivan's works for the next century. Gilbert, the author of more than 75 plays and countless more poems, stories, and articles, influenced such writers as Oscar Wilde and George Bernard Shaw, as well as laid the foundation for the success of American musical theatre on Broadway and beyond.

A novelist struggling with writer's block summons the Spirit of Romance, who reveals an unfortunate truth: his characters are wayward souls assigned to play their polar opposites for eternity. Soon, the characters come to life, defying the author's commands and making his life as miserable as possible. A Sensation Novel is a comic musical by W. S. Gilbert.