While Hari Seldon is dealing with his problems, Daneel has problems of his own dealing with other factions of robots.
Thus we are introduced to the historical schisms that have occurred within the robots over the implementation of the three laws — and also the zeroth law — creating opposing groups, each with its own idea of humanity’s future and the robots’ place within it.
Once more, not a continuation after Foundation and Earth, but a deeper look into what was going on behind the scenes in the Foundation stories.
All good stuff.
The first book in a trilogy that was authorised by the Asimov estate to be written as a sequel to Foundation. I had expected it to be a continuation from where 
After the events of 
Off we go again searching for other foundations.
Again, we have another 2 part book.
This book is divided into two separate stories, the first is when the Foundation butts up against the old Empire, still dreaming of its return to its glory days. The Empire sends one of its generals, Bel Riose, to conquer the Foundation worlds and the Foundation itself: has Seldon’s Plan foreseen this and who will eventually win?