There is no such thing as a perfect parenting book.
A lot of the time they are either they are too prescriptive, too gender-essentialist, or too wishy-washy.
This one? It's pretty straightforward, spends a good chunk of time focusing on how boys and girls aren't actually all that different, debunks some of the myths around boys and education, and leaves you feeling like so long as you give a toss, your boy should turn out alright. And, that it's ok to stuff up sometimes.
In a nutshell: Have adventures, be silly with them, have dessert first sometimes, have simple and clear boundaries, and give him space to talk. Treat rule breaking with common sense, and law breaking with intensity. Love him deeply, openly, and as physically and verbally as he will let you get away with.
This one does have a few moments of hetero-normativity, and often a bit repetitive, but I honestly struggle to complete most parenting books, but I laughed my way through this one and came out the other end thinking maybe I'm doing kind of alright.