def _is_epub(file_bytes: bytes) ->bool:
    """
	Decide if a file is an epub file.
	From https://github.com/h2non/filetype.py (MIT license)
	"""
    return len(file_bytes) > 57 and file_bytes[0] == 80 and file_bytes[1
        ] == 75 and file_bytes[2] == 3 and file_bytes[3] == 4 and file_bytes[30
        ] == 109 and file_bytes[31] == 105 and file_bytes[32
        ] == 109 and file_bytes[33] == 101 and file_bytes[34
        ] == 116 and file_bytes[35] == 121 and file_bytes[36
        ] == 112 and file_bytes[37] == 101 and file_bytes[38
        ] == 97 and file_bytes[39] == 112 and file_bytes[40
        ] == 112 and file_bytes[41] == 108 and file_bytes[42
        ] == 105 and file_bytes[43] == 99 and file_bytes[44
        ] == 97 and file_bytes[45] == 116 and file_bytes[46
        ] == 105 and file_bytes[47] == 111 and file_bytes[48
        ] == 110 and file_bytes[49] == 47 and file_bytes[50
        ] == 101 and file_bytes[51] == 112 and file_bytes[52
        ] == 117 and file_bytes[53] == 98 and file_bytes[54
        ] == 43 and file_bytes[55] == 122 and file_bytes[56
        ] == 105 and file_bytes[57] == 112
