A regional title can describe a continent, country, province, city, diaspora or one community's table. The narrower book is not automatically more authentic, but its boundary should match the explanation and recipes inside it.
Read the geographic promise literally
“Mediterranean” crosses many languages, religions, climates and staple foods. “Italian” still contains strong regional systems. A title focused on Sicily, Emilia-Romagna or one city's market can explain relationships that disappear in a national survey.
Look for the author's declared position
A useful introduction says whether the book records a family tradition, restaurant practice, historical research, travel or a contemporary personal interpretation. None of those positions is automatically invalid; trouble begins when one is presented as the whole region without acknowledging its limits.
Check whether ingredients travel
A book written for US kitchens may substitute locally available cuts, fish, flour or produce. Good adaptation explains the change. A literal ingredient list that cannot be sourced is not necessarily more useful than a transparent substitution.
Regional cuisine also moves with people
Migration creates cuisines that are rooted in more than one place. Diaspora cooking is not a damaged copy of a national original: access, memory, trade and new neighbours become part of the tradition. A strong book names that history instead of forcing every recipe behind a modern border.