3.5 stars, rounding up to 4. Overall, I really enjoyed the Miss Peregrine series, although reading all three books in a row was probably a mistake. The series has a strong finish in Library of Souls, but the quirky charm of the first book gets a little buried under the non-stop action of the 2nd and 3rd installments. I also got a little tired of the photos. They were unique and original in the 1st book, but by the 3rd, that gimmick felt played out. 
 Still, I'm glad I finally read all three and stuck with it to the end. I recommend the series, but would suggest reading other things in between to keep the reading experience fresh.