Your search for a of Powell’s book is understandable. Out-of-print textbooks can cost hundreds of dollars from second-hand dealers, and libraries may have only one reference copy.

While the book is protected by copyright, there are several legitimate ways to access it digitally:

P. Powell's book also discusses various types of organometallic compounds, including:

General survey, historical background, and Main Group element methods. Transition metal chemistry, alkyls, and alkylidenes.

Organometallic chemistry serves as the essential bridge between the traditionally distinct realms of organic and inorganic chemistry. Central to this field is the study of compounds containing at least one direct bond between a carbon atom of an organic molecule and a metal. While many texts cover this subject, P. Powell’s Principles of Organometallic Chemistry

: Short excerpts and table of contents are typically viewable on Google Books.