The great home run hitters average high in readily available biographical material--the chapters in this book on the careers of the top sluggers aren't necessary for anyone. The authors do provide a catching enthusiasm in their account, which matches the showy extravagance of the subject (occasionally they overreach themselves, as in the Introduction--""You might say the home run is America. It is taking the big swing and going for the long return; selling the grocery store in Boston and seeking gold and fortune in California..."") The chapter which compares the vastly differing techniques of the home run leaders is especially interesting, and others (""Home Run Teams,"" ""Tale of the Tape,"" ""World Series Wallops,"" etc.) are a good source of well-chosen anecdotes. The book includes tables of vital home run statistics and will include fifty photographs. Hardly a grand slam success, but it should get on base with the browsers.