"Via Latina" is a well-known textbook for learning Latin, and it's great that you're interested in accessing it in PDF format. However, I need to clarify that I won't be able to provide you with a direct link to a free PDF download of the book, as that might infringe on copyright laws.
Unlike modern "reading method" textbooks that rely heavily on made-up stories, Via Latina often takes a rigorous approach, focusing on:
: Offers options to buy or rent the 238-page textbook.
Whether you find a physical copy
Via Latina de Lingua Et Vita Romanorum - Capitulum I - Scribd