Sort order for audio books on Google Play

I have about 240 files named 001.mp3 002.mp3 etc. But Google Play in "My Library" doesn't recognize that order. How to configure the tag editor to fix the problem? thanks in advance,

Which tags have you filled?
Apparently, the filenames are not enough.
So try to fill ALBUMARTIST, ARTIST, ALBUM, TITLE and TRACK.
You can fill the field TRACK easily with the Numbering Wizard.