The Medford Public Library’s book club for fourth- and fifth-graders will meet for a full hour this month because of a special guest: Author James Howe will visit to talk about what it was like to turn his classic book “Bunnicula” into a graphic novel. He’ll also answer questions about what it’s like to write books for kids, or anything else you might want to ask. Each attendee will get a free copy of the book to keep and get signed by James Howe. (The book is available for pickup at the Children’s Desk about one month in advance.) Registration is required through the library’s online calendar. The book also is available for pickup at the Children’s Desk about one month in advance.