Spider-Girl (1998) #88

"FAMILY BUSINESS".
Even as a Skrull Worldship threatens Fantastic Five Headquarters, Spider-Girl and Franklin Richards race into the Negative Zone to prevent Apox the Omega Skrull from destroying the original Fantastic Four. With guest-stars galore, this issue also resolves the mystery surrounding the disappearance of the Invisible Woman. Part 3 (of 3).
32 PGS./All Ages ...$2.99