When writing the play 'Macbeth', however, Shakespeare did not make the Weird Sisters appear clearly feminine or masculine. An alternate analysis of costuming in Shakespeare explains that instead of simply filling in checklists of gender codes, Shakespeare's characters were dressed in different costume elements that mattered to a variety of degrees.
This is a good book by trustworthy Shakespeareans. Not especially reader-friendly in style but quite comprehensive, well-grounded, objective and informed. The individual myths, structured into moderate-length essays (thus you do not have to read them in order), can be excellent for discussions in the classroom or lecture-room.