They mentioned it's a "solid article," so perhaps it's an academic paper or a well-written piece on the internet. However, without more context, it's hard to know. I should ask for clarification. Also, if they have a specific resource in mind, maybe they can provide the exact title or author so I can guide them better. Additionally, I can suggest proper methods to find books or articles: legal databases, libraries, or purchasing the book. If it's in the public domain, sites like Project Gutenberg might have it. I need to balance helping them find the resource while abiding by copyright laws.