Well I'm upset the books will be non-canon, specifically "Bloodlines" by Karen Traviss.
That book made Boba Fett so damn badass! How he had some kind of bone-cancer, and found a surviving Clone commando that became a mandalorian bounty hunter to help with his cancer, He became a good guy, became the new Mandalore, trained Jaina Solo how to fight the Sith, and even became friends with Han Solo.
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It could still possibly be canon. A lot of things I'm the EU are semi canon under the legends banner.