Any suggestions about theory learning beyond this? Something that would help with composition perhaps? Music phrasing? Some book to read? Something for self le

Any suggestions about theory learning beyond this? Something that would help with composition perhaps? Music phrasing? Some book to read? Something for self learning? I wish that melodies I am trying to compose would be better in reflecting what I like in music, and I whish to figure out what is missing. I can improvise with different chords but it is getting boring and once I try to do something more comlex it doesn't reflect what I like. I think I am missing something basic and simple but since I had no other option but to learn myself mostly it is probable that I simply wasn't exposed to something essential in theory, something that all good composers know very whell, something that allows experimenting but in a productive way. May be there is a book that is like a bible for all composers and I simply never heard about it?