Could "sleep timer" be "suspend" in certain time? Instead of "stop" in certain time

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I think it’s a function change or add extra function. Currently, if use sleep timer, the music or audiobook stops. For music, it’s not a problem. But for audio books, for example, there are hundreds of series, it pains to find out where it stops when you want to continue to listen. So is it possible to just suspend the play? So it’s easy to continue.

You should be able to configure your library to enable Store track progress in the library’s advanced options ( > Manage Library > Edit...Advanced). With this, you’ll be able to continue playing a track from where you left.