Digital Rare Book :
The Works of Sri Sankaracharya (Memorial Edition)
Published in 1910 by Sri Vani Vilas Press, Srirangam.
In Twenty Volumes

It includes Sri Sankaracharya's major commentaries as well as his other works.
There are thus a total of 118 works, counting the two Kena Upanishad bhashyas separately, in this collection. Both Indian and Western scholars agree that many of these works must have been written by later Sankaracharyas rather than the original or Adi Sankaracharya. But there is no agreement on which ones are genuinely his. Moreover, there are many other texts attributed to Sankaracharya that are not found in this collection, some of which may have been written by Adi Sankaracharya. So it is not a definitive collection of his writings. Nor does it lay any claim to being a critical edition. Its readings can often be improved by comparison with other printed editions and manuscripts. It is simply the standard collection we have at present.