The impression I have gotten is that any mortal with magical talent can summon beings from the Nevernever. How accurate and effective that summoning is depends on how well prepared the summons is, which is enhanced by how familiar the summoner is with the target. A quick a dirty summons with no preparation, such as shouting "Mab,Mab, Mab, I summon thee!" while inside a magic circle would only work if the target was impatiently tapping her foot saying "Come on, Dresden, get your act together!" But a summons by someone who knew enough about the subject and took the time to properly prepare would compel the subject to come whether they wanted to or not. Now, the danger is that if you summon someone powerful without good reason, they may decide to smite you. Also, the summoning could be thwarted if the target was somehow prevented from coming. There are 2 examples I can think of where that came up, namely when Lea couldn't respond because she was trapped in Arctis Tor, and when Dresden tried to thwart the necros from summoning the Erlking by trapping him in a circle

YES! That was his best answer of the day! Fans giving the author evil ideas to use!

And yeah, Mab wouldn't get pissed, she'd get even. Just find another way to manipulate him

So Butcher was doing a Q&A and book signing in McLean, VA yesterday, and I was able to get WoJ confirmation for something that I've been thinking about for a while. I asked him if when he was stuck on DR between Cold Days and Skin Game, and trying desperately to contact Molly, if he could have done a summoning ritual to bring her to him. JB confirmed that he could have indeed done that, though he wasn't sure how that would have gone over. I can't see Molly being too pissed about him doing that, especially when he explained why he needed to see her. But how pissed off would Mab have been, given that she was specifically keeping them apart. Or would she have been more impressed at his ingenuity? Some combination of the two? What do you guys think her reaction would have been?

I have to disagree with, apparently, most of the people on this thread. I really liked TLJ, in fact, I thought it was quite possibly the best Star Wars movie so far. They had an interesting plot that never went quite the way you'd expect. Had a good mix of drama with some lighthearted moments that I thought worked well. They had some cute, kitschy critters, but were restrained in their use enough that they didn't become cloying or distracting. The action scenes were well-done and actually advanced the plot.  And I really liked the interaction between Luke and Rey.
I understand that some people were disappointed at the notion that Rey's parents were nobodies, but I thought that actually made the most sense in the context of the story. First of all, having her be the secret daughter of Luke, or even Obi-wan, would have been pretty contrived. Second, it was the most dramatic and heartbreaking discovery for Rey. For Luke, pretty much the worst thing he could have discovered was that Darth Vader was his father. For Rey, it was learning that her parents were nobodies and couldn't give her the answers she was seeking. I really hope they don't backtrack on this and try to make her actually the daughter of some important character, and I will be very disappointed if they do