The Camelot Code #2: Geeks and the Holy Grail by Mari Mancusi

My name is Stu, and Sophie has received her first quest as a a Companion, guardian of King Arthur's spirit throughout history. Of course I'll help, but I can't find the right time to tell her that I must move across the country for my mom's new job. Sophie has bigger things to worry about, since Morgana wants to get her hands on the Holy Grail. Luckily, Morgana doesn't know the magical cup was transformed into a small, red dragon by Merlin's new apprentice. Unfortunately, the apprentice doesn't know how to reverse the change, so we must return to the 21st century and search for Merlin in Las Vegas. Sophie's not crazy about her future stepsister Ashley joining the quest, but we don't have much choice. 

This series has shared an entertaining adventure, as it's blended magic with "reality". It was amusing to see Merlin playing video games back in medieval times, and he saved some of his spells on a handheld computer. Getting it recharged became an important conflict in the plot. By the same token, medieval characters traveled to the future, and Las Vegas offered its own share of obstacles. Leaping to different time periods wasn't that unusual, as minor characters made the trip too. It seemed to be a bigger deal in the first book. Ashley was an interesting addition to the team, since she was Sophie's biggest enemy, an her future stepsister. She was the glittery cheerleader, although Sophie discovered some admirable, vulnerable qualities hidden under that image. Merlin might have been a magical genius, but his knowledge of women became an issue needing resolution. It was hard to get help in the Faerie world when the queen hated his guts. Overall, The Camelot Code has shared amusing action/adventure stories, and I recommend you give it a shot. Sophie's role as a Companion should offer many opportunities for future exploits.