Second Foundation, of the compilation books from the stories written back in the 1940s, this one is my favourite, particularly the second story Search By The Foundation. Asimov was never an “action” writer, with most of his writing happening in discussion between the characters with a lot of exposition done by the character thinking to themselves. Search By The Foundation, comparatively, has a much more urgent plot then I find in his other works. The only other one that is similar, IMNSHO, is Caves of Steel, the first Elijah Baley novel, published in 1953.
I give this book 4.7 out of 5.