The Golly Sisters series does not have a new book coming out soon. The latest book, Hooray for the Golly Sisters! (Book 3), was published in August 1990.
The first book in The Golly Sisters series, The Golly Sisters Go West, was published in October 1985.
The Golly Sisters series primarily falls into the Historical genre. This series was written for ages 5-7 and is a good choice for children just learning to read.