I didn't like it as much as the previous book, unfortunately. 
Anne and Marilla foster a pair of twins, but only the boy gets any kind of narrative attention. The girl is just quiet and boring, while the boy is annoying and his pranks and mishaps take up about half of the book. I much prefer when Anne has mishaps. 
The solutions to life's problems as presented in this book are

reuniting with your wife (1.5/5), marrying your ex bc you broke up for a silly reason (2.5/5), moving in with your girl bestfriend (4/5), and going to college after all (5/5)

.
Very unsubtle Anne and Gilbert parallels for those first two I dare say. I wish instead we got to see more of what Gilbert is like, because I did enjoy his rare appearances very much.

Still an enjoyable outing, but this book is more a series of loosely connected vignettes rather than a more cohesive story such as the first and third books in this series. 

Anne's employment and involvement with the Avonlea improvement society, along with Marilla's adoption of twins, and a few new supporting characters added to the ever-growing roster of this series provide the subjects for these vignettes.  The plotlines that I enjoyed best were that of the improvement society and its mishaps and victories, and that of Miss Lavendar and her stone house and her romance come anew, that of her maturation as a schoolteacher and the new neighbor Mr. Harrison were tolerable, and the adoption of the twins perhaps the worst, and the reason why I'm knocking off a star.  I hated little Davey he was so wretched and annoying, and Montgomery spent so much time saying how much he was better than Dora anyways in spite of and perhaps because he was more misbehaving than her, and how much Anne and Marilla liked him better for it.  Still, I overall quite enjoyed the book, particularly that of the inhabitants of Echo Lodge and how wonderfully cozy it all seemed to be.