Though this book is called The Green Pearl, the pearl itself bookends the story, the vast bulk of which is devoted to Aillas's efforts to defeat the Ska and Casimir's political machinations. Aillas proves to be every bit as crafty as his enemies though his subjects appear remarkably calm when their king disappears without warning. Shimrod also pops up here and there to fathom the mysterious Melancthe.
The book is filled with adventure, colourful characters, and clever scenes. Dhrun fades into the background, taking a backseat to Aillas and Glyneth. The trip to the delightfully named Tanjecterly was particularly entertaining if nearly a separate story. The fact that it's a sequel works very much to its favour in that we're clear from the start which characters we're supposed to root for.
The only fly in the ointment was Father Umphred. His interminable campaign to build a cathedral really got on my nerves. I suppose he isn't meant to be a sympathetic character, but I could have done with less of him. All in all, it is a very satisfying read and a worthy successor to Suldrun's Garden.