What to read after The Revolution Betrayed?

The bourgeois world at first tried to pretend not to notice the economic successes of the soviet regime -- the experimental proof, that is, of the practicability of socialist methods. The learned economists of capital still often try to maintain a deeply cogitative silence about the unprecedented tempo of Russiaʹs industrial development, or confine themselves to remarks about an extreme "exploitation of the peasantry". They are missing a wonderful opportunity to explain why the brutal exploitation of the peasants in China, for instance, or Japan, or India, never produced an industrial tempo remotely approaching that of the Soviet Union. Facts win out, however, in the end. The bookstalls of all civilized countries are now loaded with books about the Soviet Union. It is no wonder; such prodigies are rare. The literature dictated by blind reactionary hatred is fast dwindling. A noticeable proportion o the newest works on the Soviet Union adopt a favorable, if not even a rapturous, tone. As a sign of the improving international reputation of the parvenu state, this abundance of pro-soviet literature can only be welcomed. Moreover, it is incomparably better to idealize the Soviet Union than fascist Italy. The reader, however, would seek in vain on the pages of this literature for a scientific appraisal of what is actually taking place in the land of the October revolution. -- Description from http://www.marxists.org/archive/trotsky/1936/revbet/intro.htm (April 12, 2012).