No, 'The Promised Land' is likely fictional. It could be a creation of the author's imagination to convey certain messages or explore various concepts.
Chances are it's not free. Authors and publishers have rights and costs to cover, so it's rare for such novels to be freely available. But you can search on some free eBook platforms just in case.
It depends on your perspective. Some might consider it based on real events or issues, while others might see it more as a fictional work inspired by reality.