Update index.html

Author: yimaeecs

index.html

@@ -87,7 +87,7 @@ <h3> <font face="Arial,Helvetica"> Download a Preproduction Version</font> </h3>
 
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 <h3> <font face="Arial,Helvetica"> Catalog Links</font> </h3>
-The book is currently going through press, expected to be available in early 2022. It is available now for pre-order at:
+The book is currently going through press, hardcopies expected to be available in March 2022. It is available now for pre-order at:
   <ul>
     <li> <b> US</b>: <a href="https://www.amazon.com/High-Dimensional-Data-Analysis-Low-Dimensional-Models/dp/1108489737"> Amazon Book catalog</a>.  
     <li> <b> UK</b>: <a href="https://www.cambridge.org/us/academic/subjects/computer-science/pattern-recognition-and-machine-learning/high-dimensional-data-analysis-low-dimensional-models-principles-computation-and-applications?format=HB&isbn=9781108489737">