The Madness of Crowds is the second album by Sleepthief, a free improvisation trio led by German jazz saxophonist Ingrid Laubrock with British pianist Liam Noble and American drummer Tom Rainey.

[1] The 5-star All About Jazz review by Nic Jones states "As of The Madness of Crowds, saxophonist Laubrock, pianist Liam Noble and drummer Tom Rainey are one of the most rewarding bands out there.

They were before, but now the clarity and depth of interaction in their music is enough to deepen that assertion, and when a signature sound also comes as part of the deal then it's time for the loud applause.

"[2] In a review for The Guardian, John Fordham says "Laubrock's yelping lines over Rainey's battering percussion, her contrasting murmurings over damped piano strings and arrhythmic tappings, windy multiphonic sounds amid cowbell chimes and ghostly chords reveal an increasingly distinctive Sleepthief soundscape.

"[4] The Free Jazz Collective's Paul Acquaro called the music "pretty intriguing material," and noted that the "excellent group's interplay is intriguing and interesting.