Favorite textbook for Latin self-study?

You’ll be speaking like Cicero in no time!

“Equi sunt in carro reginae!”

I really enjoyed:

Carpe Diem: Put a Little Latin in Your Life
By Harry Mount

Entertaining, informative, educational…
Highly recommended.

Edit: This isn’t a text book, per se, but it covers enough ground for you to make a determination on whether Latin is something you’d cotton to.