The 39 Clues: Cahills vs Vespers Series is the second story arc in The 39 Clues franchise, sequel to the original series (The Clue Hunt). This fantastic young-adult series features 6 adventure books written by bestseller authors—most of the authors also wrote the novels in the original series.
Written by Linda Sue Park, Trust No One is an exciting adventure novel first published in 2012. It is the 5th book in The 39 Clues: Cahills vs. Vespers young adult series. The tension of the plot is highly intense since it is the second-to-last volume of the series.
Storm Warning is an amazing adventure novel written by Linda Sue Park. Originally released in 2010, it is the 9th book in The 39 Clues, a bestselling young adult series. The two Cahill siblings, Amy and Dan, continue their thrilling hunt for the clues that hid secret ingredients to create a super serum. Shadowed by suspicion on their own au pair, they follow the hints for the next clue to the Caribbean.