Head Shy - Kate Sherwood

This might have been my favorite book in the series, I finally saw some real breakthrough in the relationship between Dan, Jeff and Evan.
Dan opens up more about his past, Jeff and Evan see him in a different light, I think. 
There is a little more sex in this one than the others ( or maybe it just felt that way) but it wasn't unnecessary, they needed a different kind of intimacy. This is definitely a must read for fans of the series. 
But after reading this one, I miss Justin all the more, and I'm really glad Chris is now back in Dan's life on a daily basis. 

And again, this one, like most of the books in this series is free.