Download or read book Abby's Twin (The Baby-Sitters Club #104) written by Ann M. Martin and published by Scholastic Inc.. This book was released on 2015-05-26 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trying to cheer up her twin, Anna, who has been diagnosed with scoliosis, Abby fears that the condition is driving them apart when Anna seems to not want Abby's help and begins to do things on her own.