Excellent reference book! Also, the description correctly uses "its" rather than "it's" (it is).

Note • Editions where William Strunk is the sole author are based on the 1918 version • Editions by Strunk & White ( E B White ) are based on the 1950's updated book • Newer editions list additional writers • While this text has been a mainstay for grammar resource, this book is not without its critics. Most feel that this book is now aged & ready for retirement

I bought this book because I wanted to get rid of the paper version but I realised it did not have enough information. For instance, the Words and Expressions Commonly Misused section only had three words with the letter A, the book I have on the other hand, have 15 words with the letter A. Furthermore, it does not have another section call An Approach to Style.

It's simply amazing that whoever wrote the description of this book, doesn't know the difference between "its" and "it's".