The page gives a brief overview of the the book, it outlines the table of contents, has a pdf copy of the introduction available and notes booksellers websites where the book can be pre-ordered.
And that last bit of information is the important bit. Its a great book, well worth buying for wives, husbands, girlfriends, boyfriends, mistresses, mother-in-laws, toyboys, family, friends, pets, total strangers you meet in the street, or any combinations of the above. Its great for birthdays, Christmas, holiday reading, Mother's day, Father's day, any day.
Honestly I don't really care why you buy it, what's important is that you buy, multiple copies, often! You really don't want to see an struggling economist die in abject poverty.
No, really you don't!