The series comprises 13 books; the 13th book is the final installment.
They are listed as Juvenile Fiction with subgenres including Family / Siblings; Family / Orphans & Foster Homes; Humorous Stories; and Action & Adventure.
The listings show page counts of 368 and 384 pages, with dimensions of about 7.0 inches high × 5.2–5.3 inches wide × 1.3 inches deep.
Listings target ages 8–12 and 9–12; one back-cover note lists “Ages 10+.”
The available details list the later books in hardcover format.
Sample review snippets include: “Wicked good fun.” and “Vivid. Designed to alight on best-seller lists.”