Searching for a should lead you to legitimate sources: university library portals (e.g., SpringerLink, ProQuest Ebook Central), the publisher Cengage’s e-book platform, or the author’s academic website if they have released older editions freely. Avoid the temptation of unverified, ad-ridden "free PDF" websites; the time wasted on broken files and malware is the antithesis of joy.
Reviews across platforms like Amazon and Reddit frequently compare it to the "Long-Form" math series, praising its clarity as a companion to classics like Casella and Berger.
Mathematical Statistics cannot be learned by reading. You must write. When the text says "It can be shown that...", close the PDF and try to show it yourself.