Saxophone sheet music

E♭ and B♭ instruments

Alto and baritone are in E♭. Soprano and tenor are in B♭. Within a pair the parts are interchangeable an octave apart, so an alto part is readable on a baritone and a tenor part on a soprano. Across the pairs they are not.

Jazz fake books make this explicit by publishing separate E♭ and B♭ editions alongside the concert-pitch C one. Buying the C edition because it seemed like the default is the classic error.

Classical and jazz are separate catalogues

The classical saxophone literature — Glazunov, Ibert, Creston, the French school — is notated in full and played as written. Jazz material is mostly lead sheets and transcriptions, where the written page is a starting point. The same instrument, two entirely different kinds of publication, and a listing that says only "saxophone" tells you nothing about which you are getting.