There are 2 books in the Harper, Sophie, and Kate series.
The Harper, Sophie, and Kate series does not have a new book coming out soon. The latest book, Footfree and Fancyloose (Book 2), was published in April 2008.
The first book in the Harper, Sophie, and Kate series, Bass Ackwards and Belly Up, was published in April 2007.
The Harper, Sophie, and Kate series primarily falls into the General Fiction genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.