The 39 Clues: Cahills vs. Vespers (Spin-Off) Books in Order

Every The 39 Clues: Cahills vs. Vespers (Spin-Off) book in order by Peter Lerangis, 2 in total. VibeReads ranks and describes books by how they feel to read, so you can see what each instalment is actually like before you commit to the series.