I believe Ylesia was added to a non-NJO book to make up for not being published with one of the NJO paperbacks. I can't think of which one right now, don't have my collection with me. Thanxs for the details SOCL, I never heard that Dark Horse was involved. Have a source? I know it was approved by George Lucas, so Chewie was fair game. And not to add another spoiler, but... Anakin's death pull a few plot threads through the rest of the books after Star by Star. So I think it was worth it