I liked the concept (you had me at time travel) but the module didn't have enough for me to build a story around. For one the plot was really weak. The characters are told that they cant affect the past so where is the motivation to save imaginary people or rescue a cook book that doesn't really exist? I ran this a few times through and after the first run I didn't bother to tell the players it wasn't real. This helped them engage in the story (now it was all about saving/fixing or changing the time line).
There is also no real conclusion. Did the players go back to the future after the first episode? Where's the wrap up?
To DMing running this: I'd suggest making up a few NPCs other than those presented and give them backstories of some sort. If you don't then this module is going to go really fast and the players are going to wonder what just happened.
[2 of 5 Stars!]