I recommend Summer's Crossing. 
 ***** 
 UPDATE: 
 Leave it to Julie Kagawa to tease me more while i hungrily wait for The Iron Knight! 
 This is a fun read, not to mention enlightening since this is Puck's POV. The dilemma he's having - by not helping Ash, Puck increases his chances of being with Meghan, but Ash is his one-time-friend, too - i feel for Puck. i really do. Somehow not leaving Ash to be killed in Summer's territory is wrong, even for Puck. i liked that about him. 
 i also liked how Kagawa made me symphatize with Puck even if I am 100% Team Ash. Puck's rarely vulnerable, but in Summer's Crossing, Oberon capitalizes on that. 
 Not bad for a e-novella to occupy me before The Iron Knight. Puck is really one master trickster! 
 ***** 
 pretty pretty cover! c'mon Julie Kagawa, sate my thirst before The Iron Knight! *jump jump jump!*