I would reccomend reading Fatal Alliance and Decived I enjoyed both of them. Though fatal alliance isn't really that important to the overall plotline.
I would recommend skipping Revan, but some people like it.
I have just started Anihilation, so I can't really give any sort of recomendation there.
Disagree about Revan, a little cliche and "easy" at times, but overall not too bad. More importantly, if you are a fan of the games, it ties in the games well. For the tie-in alone I would recommend it.
I did like Deceived a lot, but haven't read FA nor Annihilation - I went back (forward) to the Han Solo trilogy and the Last of the Jedi.