Throughout his career, Biss has been particularly noted for his immersive focus on single composers. In 2011, on Beethoven's birthday, he released the eBook "Beethoven's Shadow," a 19,000 word meditation on the art of performing Beethoven's piano sonatas. Biss was the first classical musician to be commissioned to write a Kindle eBook. Shortly after, in January 2012, the record label Onyx released the first of Jonathan Biss’ recordings of the complete Beethoven Sonatas. The disc was the first in a series of nine discs to be released over as many years. To date, eight albums have been recorded and the ninth will be released in November 2019. Biss dedicated his 2012-2013 season to Robert Schumann, declaring himself to be "a fanatic for every note Schumann wrote." The project was entitled "Schumann: Under the Influence" and explored Schumann's influences and his legacy. Biss performed a series of concerts internationally with pieces by Schumann's predecessors such as Mozart, Beethoven, and Purcell, and composers who have been influenced by his music such as Leoš Janáček, Alban Berg and contemporary composers György Kurtág and Timo Andres. As part of the project, Biss wrote a Kindle Single eBook entitled "A Pianist Under the Influence." The work explained Biss's lifelong, intense, multi-layered relationship with the composer's music and was excerpted on "Slate". Biss also released an album of Schumann and Dvořák with Elias String Quartet.