Great news — now you can browse the book list online, see my notes about the books, including recommended ages, and click on its Amazon description with book reviews.
You can find the book list, still under construction, in the Browse the book list by category section of the Torah through Literature menu.
The main book list includes the list for Seasons and Holidays, which includes the Three Weeks. Don’t miss the Beis Hamikdash and the Holocaust categories! (I did not label the Holocaust books by age, as it is very individual with books on such sensitive topics.)
G-d willing, I’ll be updating the list, and will keep you posted. My apologoies for those without internet access. If you’d like the Three Weeks book list as plain text please email me, and I’ll be happy to email it to you.