Frank Landreth and Leia Barker are among the 15-member cast in the mystery/comedy “Murder for Dummies.”Frank Landreth, left, and Leia Barker are among the 15-member cast in the mystery/comedy “Murder for Dummies,” playing April 11-20 at Tennessee Valley Theatre, 184 W. Jackson Ave. in Spring City, Tenn. They play a husband-and-wife at odds over his vast collection of books. When she decides to sell them, he consults the how-to manual that inspires the play’s title. But as the fast-paced plot proves, things can go wrong even when you go by the book. Performances start at 7:30 p.m. Fridays and Saturdays and at 2 p.m. Sundays. Tickets are $10. Reserve seats at 423-365-PLAY or www.tennesseevalleytheatre.com.