I think this one was yet the best book in the Miss Peregrine series. 
 In the first two books I had some issues with the way Jacob and the other children behaved and the stereotypical way in which they were described by the author. 
 Maybe it was because this one contained way less pictures than the other ones, but I felt the descriptions were done very well and also the plot made more sense. I liked that it had some continuity in the location and the people appearing. 
 The reason this book gets only 3 stars, though, is that the conclusion was lame and kind of stereotypical. I liked it, though, that there was some character development - if only with Emma and Jacob - and they felt more realistic compared with the first and second book. 
 All in all, I wouldn't count the Miss Peregrine series among my favourite trilogies or series, but I can see that it has its charme among many, many readers. The idea itself - collecting vintage photographs and making them into a story - is terrific, but I think only in the third book the concept became clear and there was a good mixture between actual written description and pictures. 
 The photos didn't feel like they were forced into the story anymore, rather than a welcoming addition for visualization.