Original sentence: Collier is a specialist in the political, economical and developmental predicaments of poor countries.His publication,  The Bottom Billion: Why the Poorest Countries are Failing and What Can Be Done About It (ISBN 0195311450), has been compared  to Jeffrey Sachs's The End of Poverty and William Easterly's The White Man's Burden, two influential books, which like Collier's book, discuss the pros and cons of developmental aid to developing countries
Edited sentence: Collier is a specialist in the political, economical and developmental problems of poor countries.One of his recent publications, The Bottom Billion: Why the Poorest Countries are Failing and What Can Be Done About It, published in 2007, has been described by The Economist as set to become a classic of the "how to help the world's poorest" genre, together with Jeffrey Sachs's The End of Poverty and William Easterly's The White Man's Burden, both of which, like Collier's book discuss the pros and cons of developmental aid to developing countries