How to delete album from google play mucis on phone?

Question

Android

Hello everyone, I've been using the Google play music service for a while now.
I uploaded albums to the music library via PC. Synchronized and all is well.
On the phone, I use another player for audiobooks. I downloaded the book on my phone, in mp3 format. Google services regarded it as songs and add them to yourself. There is no delete button anywhere. You can only delete track by track. But actually the book consists of ~200 mp3 files. Tired of deleting. It interferes with the fact that you include, for example, music in a random order. and you from the first 10 tracks, for example, 4 parts of this book.
I thought since Google put it in its music library, the book should be displayed in the web version of the service and there it will already be possible to delete it as an album. But no, the music library does not display this book in the web version.
The question is, how can I delete this album not per track?