This Dover edition of some of Lenin's basic works is a good way to understand his worldview. I suspect the first work, "Development", was included to give an overview of an early work of Lenin's, although I agree with the reviewer who said it would have been better to include "Left-Wing Communism." In fact, the entire volume could have been expanded slightly to include some of Lenin's other shorter works. As for the material, my favourite is "The State and Revolution", where Lenin outlines his concept of the state and explains a preference for something like the Paris Commune. Given that what emerged in the Soviet system was quite different than the Paris Commune, it's interesting to read Lenin's views on the verge of power and to contrast them decisions made to try to save the Bolshevik revolution.