Is there not a separating character between title & author? Its definitely doable if there is a known character (double spaces, [space]hyphen[space], etc.) that separates title & author reliably.
Just tested this out. Works easily for a hyphen-separated scenario. If its a comma or " , " (e.g. [space]comma[space] to remove the excess spaces) just put that in the FIND part of this.
=LEFT(A1;FIND("-";A1;1)-1)
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