This book focuses on the effects of L1 cognitive resources on L2 reading e.g. the effects of L1 reading ability, the ability in L1 mental-structure building, L1 cognitive use in L2 reading, and other related cognitive mechanisms and capacities of EFL learners in China. It integrated test-based and product-oriented as well as VPA-based (verbal protocol analysis) and process-oriented experiments to address the problems of reading in a second language. This book provides several theoretical, methodological and pedagogical insights, including the multidimensional nature of L2 reading and Vygotskyan sociocultural theory as a suitable L2 reading framework, combined approaches on L2 studies, and the rewarding active use of L1 cognitive resources in L2 learning.