Sadly underwhelmed by this one. In places, the writing is too flowery for a practical text. Being 11 years old, the book hasn't aged too well--a revision would be nice in a few years, perhaps.
My two biggest problems are with the lists themselves. There's the classic home schooler problem of reverse chronological snobbery: older must be better/idealizing certain parts of the past. And, there's a lack of any sort of diversity (few books in translation, few books from outside the Western "canon," hardly any about racism in American history...) that I've found to be sadly common in the Clarkson family ouvre.
I expected to like this one much more than I did, because I enjoyed Sarah Clarkson's Book Girl, which had a few more contemporary books, though it suffers from the same myopia that Read for the Heart does. Many, many of the books she lists are ones I've read and enjoyed. Some I consider problematic (G. A. Henty and his heavily colonial narratives, for one), but for the most part, I'm behind the texts she recommends.
Clarkson has obviously grown a lot as a thinker and writer since she published this book as a young woman, so I'm not judging her at all by this one book. However, I don't think this is quite the book it claims to be--a near-comprehensive list of "great books" for kindergarten-elementary reading. There are many, many oversights, some major (...history ends with WWII?) and some minor (Nancy Drew is deemed fluff for occasional fun reading, but the Happy Hollisters get a spot on the list, even though both series were published the same way, by the same syndicate, and have arguably identical literary quality, though for different age groups).
There's an undercurrent of suspicion of newer books, too, which bothers me. Plenty of fine books for kids are published every year. Sure, plenty of what's published isn't of great quality, but the sheer amount of new titles yearly will yield some good ones, statistically speaking. Thus, I wish there had been a chapter on what to look for in children's literature. I never stopped reading children's books, so I feel like I have a finger on the pulse of what makes a good children's book. Yet, parents are often overwhelmed in the children's section because they simply don't know what to look for: how to determine reading level, accuracy (for non-fiction and realistic fiction), how subjects are handled emotionally, the types of books that will appeal to reluctant readers or those in a rut, et c. It's clear that Clarkson uses metrics for these things, in addition to recalling what she loved from childhood, so I'd have appreciated a chapter dedicated to this.
The focus on older books absolutely ties into the exclusively white/Western focus. Publishers are (slowly) printing more books with diverse authors and subjects. Awakening children to the beauty of diversity, demonstrating appreciation of different cultures/languages, and broadening their narrow horizons is essential. There are plenty of lists of diverse children's books around the internet that can guide better reading habits, and children's librarians are a wealthy resource, too.
Overall, it's not likely I'll revisit this one. I'll add a few titles to my TBR and send this book back to the library.