Serenity Series (#1-3)

By Joss Whedon

Those Left Behind: Yes, it's awesome.

Better Days: Action and fun to read, nothing will replace the show, but this is a nice continuation. After this one there are two other "between-quels". One and two.

The Shepherd's Tale: One of the most interesting of the comic series. Shepherd's life is twisty-er than expected, but when one realizes how long life can be, it doesn't take away from the surprises of his beginnings. After which is Downtime.