I haven't seen the updated version, but the one on gutenberg is gold. The old language is comical on its own: he cracks jokes and it is funny because of the jokes //and// because of the old language.

This book is so good, that gutenbeg volunteers took the time to typeset all the math in latex so the PDFs are very good for reading or printing out.

excerpt:

   PROLOGUE.
   
   Considering how many fools can calculate, 
   it is surprising that it should be thought 
   either a difficult or a tedious task for any 
   other fool to learn how to master the same tricks.
   
   Some calculus-tricks are quite easy. Some are 
   enormously difficult. The fools who write the 
   textbooks of advanced mathematics—and they are 
   mostly clever fools—seldom take the trouble to 
   show you how easy the easy calculations are. 
   On the contrary, they seem to desire to impress 
   you with their tremendous cleverness by going about 
   it in the most difficult way.

   Being myself a remarkably stupid fellow, I have had 
   to unteach myself the difficulties, and now beg to 
   present to my fellow fools the parts that are not hard. 
   Master these thoroughly, and the rest will follow. 
   What one fool can do, another can.