I recently finished the latest book in the new series Legacy of the Force (not to be confused with the aforementioned Legacy comic book series) and it was rather excellent. The previous book, Tempest, had better action sequences, but this book served to move the storyline on mor and develop events. essentially, just as things were getting better, now they'll be a whole lot worse. What's happening in these books is that the stable government that overthrew the Empire all those years ago is now breaking apart, first with Corellia, Han Solo's home planet, and other slowly join. I'll do a review later once my friend has read the book so as not to spoil it, but I thought I'd fill folks in on the important details you'll need to know as you read this series, starting with Betrayal.
. It is now 40 years since the events in the original Star Wars movies took place
. Han and Leia are married and have three children, Jacen Jaina and Anakin, who died. Luke is married to Mara, a former enemy, and has a son, Ben
. The remnants of the Empire were pushed back to a small area of space and eventually signed a truce with the New Republic, later they Allied with them and formed the Galactic Alliance
. A species from another galaxy, the Yuuzhan Vong, who were immune to the force and used living creatures as weapons invaded the galaxy, they were eventually defeated after conquering most of the galaxy, even coruscant the capital, and destroying whole worlds and species
. There are now over a hundred Jedi serving the galaxy in a new academy on Ossus, a world special to Jedi - the temple on Yavin 4 in the old rebel base was destroyed, they also have a temple on coruscant for the council to meet
Well obviously there's a lot more going on, but that should be enough that you can read the books and enjoy them well enough.