This is a collection of connected stories:  * The Birthday Gift, by Elisabeth Waters  * Dragon in Distress, by Mercedes Lackey & Elisabeth Waters  * The Dragon's Horde, by Elisabeth Waters & Raul S. Reyes  * A Prince Among Frogs, by Elisabeth Waters  The story arc started when Princess Rowena's sorceress aunt gave her a fourteenth-birthday gift that could truly be described as enchanting, which impelled Rowena to leave home and take refuge with a dragon. Then things really spiraled out of control, dragging in Tarma and Kethry, a pregnant mercenary (and being carried off by a dragon while suffering from morning sickness is not a fun experience), and a rather clueless prince. And after tangling with Rowena, the prince needed a witch to rescue him.