As usual not even close to the book with the exception of Rosie.
I don't fault her screenplay for being significantly different than the book or the director for taking certain liberties to fit an entire novel into a 90 minute movie. A good example is making August the owner of the circus and eliminating Or combining Uncle Al. Let's just say the set ups that should have been there for the payoffs were not. The love affair between Jacob and Marlena made perfect sense in the book and made little to no sense in the movie. Supporting characters also were not developed enough. The positives were how Holbrook opening and closing the movie who did a great job but mostly a cameo.
And of course Rosie the elephant Who is real and not CGI was the highlight of the movie. It's the usual problem that a motion picture does a great job showing the train in the big top in the menagerie etc. etc. but the story is lacking. Not a disaster but a very average movie that could've been better.