This digest-size pocket book reprints Marvel Spotlight #32 and Spider-Woman #1-#8. You get not one, but two different origins for the character. (And Marvel retconned her again later.) She really is mysterious.
Personally, I like the first story (Spotlight #32) best. Spider-Woman is tricked into attacking S.H.I.E.L.D. and Nick Fury. She figures things out (of course), and HYDRA learns to regret its deception.