Countertenor: Anthony Roth Costanzo on the voice that helped define contemporary opera

Opera singer Anthony Roth Costanzo joins former Boston Globe classical music critic and Tufts professor Jeremy Eichler to talk about his book Countertenor and the history of the countertenor voice. He will also perform selected arias. Brookline Booksmith will sell copies of the book.

Doors open at 6:30 p.m. Tickets are $10 to $30.