Author D.M Greenwald will be guest presenter at the Hopkins District Library at 6 p.m. Monday, Aug. 26. Greenwald, author of several titles, but he will speak specifically about the Jenny Dog and the Son of Light series, a grouping of books ideal for teens, young adults and adults of all ages. Greenwald will read an excerpt from his book, Frozen Moon, and share his experiences as a dog trainer, a writer, and an author dealing with agents, publishers, and the self-publishing process.