I just finished a re-read of this with the kids. I absolutely love this out of print series and it's one of my favorite historicals.
It's the third in the trilogy and Nancy Bruce has been happy in her time with Grandma and Grandpa but is eager to see her parents again. She's torn though, because she wants to stay with the Bensons and Carlsons.
When the Benson's old friends Uncle George and Aunt Hanna visit, they take everyone to see a little house George remembers - a house which ends up being the center of their lives.
The children become enraptured with the house and its history and Nancy and her family arrange to rent it once her mother is well enough to move.
Things I love about this book: The friendships are great- there isn't really any strife/resolution which is sort of typical of historicals, but I like how kids valuable their older neighbors and visit with them.
The disability portrayal for Alex isn't perfect - again I've never seen a disabled person's take on it - there's definitely a bit of pity/poor Alex at times, but the girls include him because he is their friend NOT out of pity. This book in particular addresses his disability - he has to undergo a serious surgery - the goal of which is NOT to make him walk, just strengthen his spine enough that he would be able to manage transfers independently as he ages. It's always good to show that people who are disabled have chronic medical needs and that there are no "miracle" fixes - or that a "miracle" fix doesn't result in the person becoming able-bodied, it just results in more freedom. In this book his mother discusses how their current home won't be sustainable, because as he ages, people won't be able to carry all the time - and she arranges to have a house built on a single level so that he can have more appropriate accommodations as he ages. While it's never outright stated, it is VERY clear in the book that Alex and his mother are rich - and if you're doing this as a read-aloud with your kids, it's definitely an opportunity to discuss how much Alex is able to have accommodations because of his family's wealth.
One of the plots to the book involves the daughter of the house's owner who died very young. She was substantially weakened by a bout of diphtheria, which left her blind and with a heart condition. The book delves into this a bit - again with her family being able to provide her with some comfort due to wealth and then choosing to use this wealth to donate to hospitals to assist other children.
In writing this it sounds like this book is boring or preachy but it's really wholesome and sweet. It has less in it about Swedish traditions than the first book, but it's still lovely.