Happy All Saints' Day! Two of my favorite resources for stories of the saints for children are Once Upon a Time Saints and More Once Upon a Time Saints, both by Ethel Pochocki. Tomie DePaola and Demi have been quite prolific in the saints picture-books department, too. A quick search online lead me to Caedmon's Song by Ruth Asby, illustrated by Bill Slavin, and published in 2006. I don't know yet if it's good, but I'll let you know when I get my hands on a copy.
November 2 is the Feast of All Souls. I really appreciate the Mexican Dia de los Muertos, and would like to participate in a festival someday.