I love how this author is developing the protagonist and the wide range of characters who matter to her, within this book series. The romantic feelings described/revealed in this stage of the storyline are remarkably accurate for a YA of Steffie's age, development, and character. I went through a somewhat similar experience at precisely the same stage in my own development and learned later just how common it is, especially for gifted girls (who are, intellectually and emotionally, way beyond their years). The superficial goggling over celebrities, popularity, fame, etc., that is far more common for "conventional" YA girls isn't part of the internal world of those with advanced emotional ranges, while falling head-over-heels for an older teen who is more similar in internal qualities is very much so (older teens need to be warned about this, in my opinion, as it is so common and frequently misunderstood by all involved).
As her father writes in his letters to her, both girls are having to grow up far more quickly and roughly than is the ideal. I'm grateful that fact is relayed within the book as most preteens/teens have no idea how to compare/contrast their own lived experiences with the norms for their age group. Their naivete about this and so many other life realities often leaves them feeling very alone, ashamed, and confused.
So many other meaningful topics are broached for the first time, in this second book of the series. Most unusual, to me, was learning how Swedish Jews who had been thoroughly assimilated into Swedish life over multiple generations responded to the influx of refugee Jews. I've never heard this topic mentioned in any book before, whether fiction or nonfiction. Of course, it's understandable that shared religious commonalities don't necessarily translate to political, economic, linguistic, or cultural ones. That is true of religious groups of every type, all over the world. I'm looking forward to reading the remaining two books in this series, once theya re translated.