Okay, I'm one among the many users who experienced this exact same thing, and Gumroad seems to indicate this variant is 'Sold Out' and doesn't let me get anythi

Okay, I'm one among the many users who experienced this exact same thing, and Gumroad seems to indicate this variant is 'Sold Out' and doesn't let me get anything by typing $0 (or any other number for that matter). The book is available on Z-Library by cursorily searching for the Title of the book. Sigh. Hope the author fixes this by putting it on GitHub (or) removing the link to the Gumroad site that doesn't work.