If you prefer reading on paper, you might consider using a "Print on Demand" service if you own the digital file, or checking secondary marketplaces like or Todocoleccion for any limited promotional print runs that may have existed in the past.
If you are looking for a copy, here is the current availability:
There is currently no widely distributed physical "paper" edition available through major retailers or the publisher's active catalog.
You can find the digital version on major platforms like Amazon (Kindle) and Google Play Books.