Collects What If? (1989) #105, Spider-Girl (1998) #1-15, #1/2 and Annual '99. What if Peter Parker and Mary Jane had a daughter? The ever-amazing answer is she'd be May "Mayday" Parker - A.K.A. Spider-Girl! Spinning out of the pages of WHAT IF? into her very own universe, the teenage Mayday inherits spider-powers and dons her retired father's red-and-blues! Now follow her adventures from the beginning as Mayday learns about Spider-Man's legacy and wrestles with whether to follow in his footsteps! She'll face threats old and new - from the Venom symbiote and Kaine to Crazy Eight and the Dragon King - and meet incredible faces from the future Marvel Universe including Darkdevil, Wild Thing, the Fantastic Five and the newest roster of the mighty Avengers! Discover a friendly neighborhood hero for a new generation!