This book, the final volume in Mary Renault's Alexander the Great trilogy, covers the events right after Alexander's death. Without Alexander's powerful personality to provide unity and focus, his astonishing empire is quickly deteriorating into a mess of intrigue and entropy.
Funeral Games kind of suffers from the same problem. Without a strongly-rendered main character to provide focus and cohesion it just doesn't have the same enthralling quality as the first 2 books. As a novel with an ensemble cast, it isn't bad, and you get a decent picture of the historical happenings that the fictional story is built on... but it just seems a bit superfluous.
(This just squeaks by with an 8 out of 10, because it's still well above average quality for an historical novel. Definitely the weakest in the trilogy, though.)