How do you write a logline? Why are loglines important? Do I need more than one logline for my screenplay? Find these answers and more in HOW TO WRITE A LOGLINE: QUICK GUIDEBOOK FOR SCREENWRITERS from producer and screenwriter Dr. Melissa Caudle. Dr. Mel is the CEO of On the Lot Productions, LLC . If you thought SAVE THE CAT was great, then you'll be a believer in this RESCUE THE DOG SERIES. Dr. Mel finishes what Blake Snyder started in the most comprehensive book on writing loglines available for screenwriters. A must have in any screenwriter's resource library. Included in the book is the short film script THE KEYSTROKE KILLER, the instant cult classic short film.