The Mystery At Eagle Harbor by M. C. Tillson
I picked up this book at a thrift shop and never realized it was the 2nd in a trilogy. I did enjoy it and caught on very quick of what was happening. It follows a Sam & Becky, brother and sister, on a family vacation to Eagle Harbor while their parents are writing a book about lighthouses. The story is a mystery but also give lots of factual info about areas in Michigan. I did enjoy it and hope one day to find the other 2 books in the series. I would recommend for younger readers.