There are 2 books in the Future History/Heinlein Timeline series.
The Future History/Heinlein Timeline series does not have a new book coming out soon. The latest book, The Man Who Sold the Moon (Book 1), was published in February 1951.
The first book in the Future History/Heinlein Timeline series, The Man Who Sold the Moon, was published in February 1951.
The Future History/Heinlein Timeline series primarily falls into the Science Fiction genre.