Sibby’s Secret and The Monster Bones on St. Frederick Island continue Linda Maria Frank’s Buccaneers middle-grade line — island mysteries for readers roughly ages 7–12 who love caves, clues, and courageous friends. They follow The Buccaneers of St. Frederick Island and make a natural classroom bridge into evidence-based discussion.
Former science teacher Linda Maria Frank writes these stories so curiosity and observation matter as much as suspense — the same habits teachers reinforce in STEM and literacy blocks. Series overview: What Is the Buccaneers Series?
Book spotlights
- The Monster Bones on St. Frederick Island — caves, “monster bones,” and curiosity that won’t quit.
- Sibby’s Secret — another St. Frederick Island mystery with beloved Buccaneers characters.
- The Buccaneers of St. Frederick Island — start here, then Monster Bones, then Sibby’s Secret.
Classroom angle (science teacher → mystery author)
Use a Buccaneers title for independent reading, then ask students to track claims vs. evidence — just as a science lab would. Pair with free printable discussion guides for Annie Tillery titles when older groups are ready, or listen to YouTube chapter readings on the listen page. Author background: science teacher turned mystery author · Meet Linda.
Classroom sets and print copies: purchase page. Reading path for mixed ages: where new readers should start.
FAQ
What is Sibby’s Secret about?
It is a Buccaneers middle-grade mystery on St. Frederick Island, following The Buccaneers of St. Frederick Island and The Monster Bones on St. Frederick Island.
What age is Monster Bones for?
Roughly ages 7–12 — the same band as the Buccaneers line.
Can teachers use these in class?
Yes. They support literacy plus evidence-based thinking; pair with discussion prompts and, for older readers, Annie Tillery guides.
What order should we read?
Buccaneers → Monster Bones → Sibby’s Secret.