There are 4 books in the Time Machine Magazine series.
The Time Machine Magazine series does not have a new book coming out soon. The latest book, Grit and Gold (Book 4), was published in January 2016.
The first book in the Time Machine Magazine series, Valor and Victory, was published in January 2016.
The Time Machine Magazine series primarily falls into the General Fiction genre. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.