"Warm Valley" brings Jonathan Kreisberg's 2008 album Night Songs to a close with an affectionate reading of Duke Ellington's sensuous ballad, performed on electric guitar with the full quartet. Kreisberg's two-chorus solo over the 32-bar AABA form at a relaxed 112 beats per minute showcases his warm electric tone and lyrical melodic sensibility. Ellington composed "Warm Valley" in 1940, originally as a feature for alto saxophonist Johnny Hodges, whose voluptuous tone defined the piece's character. Kreisberg's guitar brings a different but equally appealing warmth to the melody, his phrasing singing and vocal in its expressiveness. Bassist Matt Penman contributes a half-chorus solo, his acoustic bass providing a woody contrast to the electric guitar. The key of B-flat major suits the composition's relaxed, comfortable mood. Gary Versace on piano and Mark Ferber on drums round out the quartet, their support unobtrusive yet harmonically rich. As a closing track, "Warm Valley" offers a satisfying sense of arrival, its gentle swing and contented emotional character providing a natural conclusion to an album that has moved through a range of nocturnal moods. Night Songs stands as one of Kreisberg's finest recordings, and this track encapsulates its intimate, reflective spirit.