Start with high-confidence historical linguistics books, then narrow by subgenre or adjacent topics.
Mother Tongue
Beth Hicks, Jenni Nuttall
Fluent Forever
Gabriel Wyner
The Merriam-webster Dictionary
Merriam-Webster
Merriam-webster’s Dictionary of Law
Merriam-Webster, Anonymous
Words From Hell
Jess Zafarris
Phraseology
Barbara Ann Kipfer PhD, Barbara Ann Kipfer
Proto
Laura Spinney
