Literary allusion courses through the annals of pop music, from the Tolkienesque rambles of Led Zeppelin, the Camus-inspired doting of The Cure, and the endless Judy Blume references that rescued The Beatles from obscurity. Savor page-turning music with today’s Groupon to see The Decemberists at Jacobs Pavilion at Nautica on Tuesday, July 26, at 8 p.m. Doors open at 7 p.m. Choose between the following options:

• For $20, you get one general-admission ticket in the upper bleachers of sections 4–6 (a $28.50 value before fees, or up to a $39 value online, including all ticketing fees).
• For $20, you get a reserved seat in the lower half of sections 4–6 (a $28.50 value before fees, or up to a $39 value online, including all ticketing fees). Reserved tickets are assigned on a first-come, first-served basis.

The Decemberists' capricious blend of unapologetically cerebral yet wildly accessible jangle pop and classicist folk has struck a resounding nerve in critics and music fans alike, catapulting the underground darlings into lauded ubiquity. Touring behind its sixth full-length album, The King is Dead, which debuted at No. 1 with a musket ball on the Billboard 200, The Decemberists carts its minstrel medicine show of harmonic elixirs across America like diligent cartographers heckbent on alleviating Stockholm Syndrome in whale-abductees. Colin Meloy and his crew of antiquated-instrument virtuosos take congregations on emotional sojourns in their unpredictable live shows, which sometimes involve inviting the audience to participate in sea-battle reenactments or melodious mass butter churning. Consorting with The Decemberists on the July 26 show, The Head and the Heart plays from the latter, ensnaring fans using its acicular hooks and phantom limbs.