Just finished this one. It was simple to read and follow. I finished it in about two hours after my little one went to sleep last night. As for how it works...that remains to be seen. I haven't worked up the nerve to try it yet. I may report back after we've given it a shot.ETA: This definitely works though it isn't for everyone. Madison cried for about 45 minutes the first night and about broke my heart. The second night she cried for less than two minutes and slept 12+ hours. Same thing on the third night. I hope it continues to work well as she adjusts to the new routine.