The standard university Mandarin textbook series, now in its fourth edition.
About this tool →Details
Four volumes of systematic grammar, dialogues and character work, used by most North American college programmes, with workbooks, audio and a web app for exercises. If you want a spine for self-study with a clear sequence and available answer keys, this is the safest choice. It is expensive, the dialogues are dated and campus-centric, and it is written for classroom use — self-learners need to supply their own speaking practice.