by Sally Matheny   Photo: Operation Birthday Celebration– A Journey to the Manger I stumbled upon a gem for you all while reading Vonda Skelton’s blog the other week. She was interviewing author/illustrator, Angelika Martin, about her Christian children’s book, Operation Birthday Celebration—A Journey to the Manger.   I knew I wanted to review this book when the author said, “Christian parents want creative resources that capture a child’s imagination and fuel curiosity while staying true to biblical teaching. Operation Birthday Celebration is entertaining while supporting Christian values and doctrine.”   Martin initially wrote the book for her grandchildren because she “didn’t want Christmas hijacked by an elf.” Soon, however, other families,…