UN SEGRETO DI FAMIGLIA (Italiano B1-B2): Russian Spy. Operazione Bruxelles 1(Italian language for B1-B2 level students) (Spy novels to improve your Italian B1-B2)
Go for it. Really helps integrate all the grammar you're learning in your Italian class, plus there's tons of fascinating vocabulary. If you did all the exercises for each chapter, which I didn't, your proficiency would increase tenfold.