"Who" by Geoff Smart is a hardback book published in 2008 by Random House USA Inc. The book, written in English, falls under the genre of personnel and human resources management. With a height of 2.4 cm, length of 24.5 cm, and width of 16.3 cm, this 434g book provides valuable insights on effective hiring practices for organisations in the United States of America. Geoff Smart's expertise in the field is showcased through this informative and practical guide for those looking to enhance their recruitment strategies.