Damia's Children (1993) by Anne McCaffrey continues her Tower and Hive series. Rather than pseodo-biographies of the title characters, this book is a series of novellas focusing of four of Damia's children. Rather than giving us a long, dull slog, this book gives us four snappy, shorter stories, forming an actual narrative arc. While still a little simplistic, as the general text and texture of the whole series is rather a throwback to 50's SF, the simpleness generally works better in the context of a YA story. Because the galaxy doesn't depend on the actions of any one character, the story can follow more personal arcs, with each character finding a place by the end.
Because the subject matter is generally lighter and fast, the book projects a far lighter and sprightly feel than the earlier volumes. Very little feels unnecessarily padded, events all seem reasonable, and everyone gets some chance to show off their cleverness.
If you've gotten this far in the series, you'll find this title easy going.