Avoid downloading copyrighted PDFs from unauthorized sites. If you need a free legally-available alternative, look for classic public-domain complex analysis texts (e.g., Ahlfors’ older editions are not public domain, but there are lecture notes and older texts by authors who released material openly).

I see the keywords in your search:

: Best suited for graduate (Masters) students or advanced undergraduates. Reviewers often note that while it begins at a basic level, the depth and rigor make it challenging for absolute beginners