https://www.palmbeachpost.com/obituaries/pwpb0177944
(with photo)

Most of it:

Eugenie Chazal Reid, a retired legal editor, librarian, children’s author and amateur genealogist whose curiosity and passion for research touched generations of family and friends, died peacefully Tuesday, March 22, at 97.

Eugenie was born and raised in Woodbury, N.J. and moved with her mother to Ocala in 1941 at the age of 16. After graduating from Ocala High School, she studied English at the Florida State College for Women and library science at the University of North Carolina at Chapel Hill. She married George Kell Reid in 1949 and they moved to Gainesville, where she worked as a cataloger in the University of Florida’s library while George conducted graduate research in marine biology. The couple lived in Virginia, Texas and New Jersey before settling in St. Petersburg, Fla., where they raised two children, Deborah Louise Reid and George Philip Reid.

Eugenie wrote two children’s mystery novels set in Florida: ‘The Mystery of the Carrowell Necklace’ (1965) and ‘The Mystery of the Second Treasure’(1967). Both were published by Lothrop, Lee and Shepard Co., now an imprint of HarperCollins Publishers. In the 1970s, she and her daughter became the first mother-daughter duo to study together at the Stetson College of Law. After receiving her law degree in 1976, at the age of 51, she worked as a law editor for the Commerce Clearing House, a publishing company in Tampa. For decades she pursued her passion for genealogical research wherever it led, from libraries in Utah to churches and cemeteries in England and France, ultimately tracing her family’s history back to the 17th century.

In retirement, she moved to Palm Beach Gardens to be closer to her daughter and her family. There, she played the organ during services at St. Mark's Episcopal Church and continued to pursue her longstanding interest in genealogy and biblical history. In her final years she lived at the Brookdale Senior Living community, where she managed the community library...

(snip)

2013 Amazon review of Mystery of the Carrowell Necklace:
"Just finished reading my old copy (bought at a yard sale back in the '70s) with my 10-year-old. I always enjoyed it and now she does, too. A fun family mystery about a necklace that disappeared two generations back. Some old-fashioned language, but really just enough to learn some 50 cent words. :-) A satisfying ending."

https://www.ebay.com/itm/353168524716
(book cover)

http://loganberrybooks.com/solved-m.html
(possible details on Mystery of the Second Treasure - the titles are in alphabetical order)