Use Library Search to find scholarly journal articles that address your book's themes, historical context, or genre.
TIP: If you don't know much about your assigned book yet, look back at NoveList Plus. What subjects and themes has your book been tagged with?
Or, skim the book reviews you already found. What historical context, themes, or genres do those reviews describe?
Now look for scholarly articles about those themes/genres in young adult literature:

On the results page, click the filter on the left for peer-reviewed journals:

Click on relevant-looking titles to read a summary and assess the relevance to your book and its themes.

If you don't find any relevant articles using the library databases, try expanding your search to get books or articles from other libraries:

Or try Google Scholar.