Beware of random Google Drive links. Verified versions are often found on educational platforms like MusicNotes, SheetMusicDirect, or specific piano educator websites (e.g., "Piano With Kent" or "The Complete Pianist"). Some are even available on IMSLP if the patterns are based on public domain etudes.
Enter the legendary resource often whispered about in forums and practice rooms: the . piano accompaniment book 300 left hand patterns pdf verified
If you search for this book on Google, you will find dozens of links. However, many of them are: Beware of random Google Drive links