Question: Can you suggest a digital library that allows me to search for specific keywords within books and organize notes and references?

If you're looking for a digital library with keyword search across books and tools to record notes and references, Perlego is a good option. It has access to more than a million professional and academic ebooks and includes keyword search, note-taking and reference tools. Perlego also comes with an AI-powered research assistant, study guides and a mobile app for studying on the go, so it's a good option for students, teachers and self learners.

Another good option is OpenRead, which offers a powerful search experience with access to more than 300 million papers and trillions of web sources. It also has tools for taking notes and organizing documents, including Paper Espresso for summarizing content, Paper Q&A for asking questions and a Related Paper Graph to show relationships between papers. It's good for researchers who need to keep up with the latest research in their field.

If you want more AI help with research and note taking, genei can automatically summarize documents, analyze research and extract key information. It can help you organize documents, extract keywords and annotate and highlight text. It's good for professional writers, academics and researchers who want to get a leg up on research and writing.

Last, Unriddle offers an AI assistant that helps you read and research documents by answering questions immediately, summarizing complex information and taking notes. It also creates interactive graphs to show relationships that aren't immediately apparent and can handle large PDF files. It's good for researchers who need to quickly read and extract information from lots of documents.