Posted by Sheila Connolly I'm writing a mystery series featuring Tucson glassblower Em Dowell as my protagonist. The "hook" was handed to me by an editor, and, in the interests of full disclosure, I told her "I don't know much about glassblowing." Apparently that wasn't a problem for her, and I hope that meant she had faith in my ability to bone up on a subject, even though she had never met me a…