c+t in b

any traditional harmony book will contain a few chapters about melody. so will a counterpoint text. they typically focus on the same 'rules' e.g. opposite motion after a leap of a 4th or more

it basically comes down to understanding direction and non-chord tones. Tonal harmony by kostka and counterpoint in composition by salzer & schlachter are terrific texts

a real/fake book is nothing but chord charts to various songs. filled with melody against harmony. probably should be your next resource after a textbook

counterpoint isn't about building choir's(though you could use it as a starting point for that). It's carefully constructed melody against melody. Listen to a bach fugue for multiple melodies at once

get a real book and a fake book and you're set