To confront this new challenge, printers, scholars, and compilers began to develop novel ways to manage all these texts — tools that listed, sorted under subject headings, summarized, and selected from all those books that no one person could master. Note-taking was one solution, which the humanist pedagogues advocated alongside their teaching of ancient rhetoric. But not everyone followed their advice to take notes from everything they read throughout their lives, and for those who didn’t, new kinds of reference books offered a ready-made version — collections of best bits that could be consulted using sophisticated indexes and tables of contents.