Short answers, pulled from the story.
The Legacy of the Force series arrived between 2006 and 2008 as a nine-book saga set in the Star Wars expanded universe. Del Rey Books published these novels, which took place roughly forty years after the events of Star Wars Episode IV: A New Hope.
Three authors shared the writing duties in an alternating cycle including Troy Denning, Aaron Allston, and Karen Traviss. Each author took turns writing one hardcover novel and two paperbacks to maintain a steady release pace throughout the project.
Jacen Solo began his training of his young cousin Ben Skywalker on the 30th of May 2006 during a mission to Adumar. He later became the principal antagonist of the series known as Darth Caedus by November 2007.
Jaina confronted Caedus aboard the Anakin Solo in May 2008 where she severed his Achilles tendon and stabbed him in the heart. She acted as a sniper while accompanied by several Mandalorian commandos before engaging him in their final duel.
The first, fifth, and ninth books were released as hardcovers while the remaining six titles appeared in paperback editions. An abridged audio version accompanied every book release with Marc Thompson narrating all the adaptations.