Glossika offers an audio method that consists of hundreds of bilingual sentences read by native speakers. They are selected to be natural-sounding and very common sentences and structured to build up your vocabulary as you use them. This method does not explain grammar but teaches it to you passively
Their "Fluency packages", include around 3000 sentences with pronunciation guide as PDF books + MP3 audio. They feature mandarin Chinese with Beijing and with Taiwanese Accent (also Cantonese, Hakka and taiwanese Hokkien).