#46 The Strangeworlds Travel Agency by L. D. Lapinski

When 12-year-old Flick Hudson accidentally ends up in the Strangeworlds Travel Agency, she uncovers a fantastic secret: there are hundreds of other worlds just steps away from ours. All you have to do to visit them is jump into the right suitcase. Then Flick gets the invitation of a lifetime: join Strangeworlds’ magical travel society…