Student or Learner
The famous book Chicken soup for the woman's soul.
Should I use women's instead of woman's according to the grammar structure?
You should use the exact title that the book uses.
The series has chosen to use the singular.
... for the woman's soul.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.