Of course, here are a few books that might be interesting:
Naksitrallid by Eno Raud
Kunksmoor by Aino Pervik
Arabella, mereröövli tütar by Aino Pervik
Sirli, Siim ja saladused by Andrus Kivirähk (you can also find this as an audiobook here)
Seltsimees laps by Leelo Tungal
All of the authors have a wide range of books so if you like their style, you can look for other books they have published.
Ingrid, OLS Community Manager – Estonian