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.
I'm not sure specifically as there could be many novels with that title. It might be about a journey to a fabled or ideal place, perhaps a utopian or longed - for land where characters seek new beginnings, freedom, or the fulfillment of dreams.
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.