Hatching Magic, book 1
Ann Downer-Hazell2006

"You never know when magic will hatch...." Poor Theodora Oglethorpe! Her biologist father has gone off to explore the jungles of Laos without her, her best friends are away on vacation, and a long, hot, lonely Boston summer is all she has to look forward to.

Poor Gideon! Wycca, his pet wyvern, has disappeared through a magic hole in time in search of a place to lay her egg. Kobold, Gideon's wizard rival, wants nothing more than to get his hands on Wycca. In a desperate attempt to rescue Wycca from Kovold's evil clutches, Gideon follows her through the magic hole...and finds himself transported from thirteenth-century England to the terryfyingly modern world of Boston, Massachusetts, in the twenty-first century.

Soon Theodora's involved with a chocohlic baby wyvern, a mysterious wyvern playing card, a couple of desperate wizards -- and the summer vacation of her life!