Ask HN: AI tools for studying text material?

I'm looking for AI/LLM/Text-to-Speech tools to aid in studying. I need to absorb 200 pages of articles for my university exams, which are primarily composed of prose. The goal is memorizing this content efficiently.

I'm seeking a mobile app where I can input plain text articles and listen to them as audiobooks at increased speeds. Are there any recommendations for tools that offer natural-sounding voices, including options for non-English languages? Additionally, I'm interested in tools that can generate quizzes from the text material or identify key claims and provide summaries.