The Selden Carol Book is a medieval carol manuscript held by the Bodleian Library in Oxford (MS Selden B.26). Along with the Trinity Carol Roll, with which it shares five contemporaneous carols and texts (for example the Agincourt Carol), it is one of the main sources for 15th century English carols, and like the Trinity Roll contains the music as the well as the texts. The inclusion of "Deo Gracias Anglia" referencing Henry V's victory at Agincourt in 1415 gives an indication of the date of composition of the carols.