ISBN-13: 9781482094435 / Angielski / Miękka / 2013 / 140 str.
A long-lost friend returns to the Carter house for a visit, but something strange is afoot. Peter and his twin brother Jack seem to be mixed up in a mystery. When one of Katie's own family members gets mistakenly pulled into the danger, it becomes personal, and she takes a trip south to straighten things out. Can she unmix the mix-up? Find out in the next Katie Carter mystery story - Katie and the Great Twin Mix-up