This paper is about my process of composing and performing music inspired by The Great American Songbook. Doing this via tools acquired by analyzing the works from composers like Irving Berlin, George Gershwin, Arthur Johnston and other composers from that era. I have analyzed and found common associations with form and harmony, the use of melodic content and often used clichés which I have incorporated in my own composing. It also deals with my progress to arrange and rehearse the music to present it in form of a concert at The Royal College of Music on the 6thof March 2020. I reflect about the process of composing and if I achieved the same level of freedom playing my compositions as I have playing jazz standards. I come to the conclusion that I feel as confident performing these tunes as I do music from The Great American Songbook. / <p>Medverkande på konserten: Björn Bäckström (tenorsaxofon), Erik Tengholm (trumpet), Lars Ullberg (trombon), Jonny Ek (piano), Uno Dvärby (kontrabas), Jakob Bylund (trummor). Till uppsatsen bifogas inspelningar och partitur på mina egna kompositioner som är kopplade till arbetet: It's Time, Diminished Results, You can't keep this up, Midnight mood, Oh sweet Olivia och Dortmund Express. Även bifogas inspelning på Don't Get Around Much Anymore, skriven av Duke Ellington, som framförts vid konserttillfället. </p>