This book covers the recent research trends in Mobile Adhoc Networks (MANETs). It explains the trust management methods in MANET through trust computation, aggregation, propagation and prediction. This book has a detailed discussion on soft computing methods in MANETs like fuzzy logic, fuzzy petrinets, Concurrent Reasoning Algorithm (CRA) and Dempster Shafer Theory (DST). This book explains the need of service oriented architecture in MANETs. It covers the different service discovery and composition methods. This book helps the students and researchers to understand the current trends in MANETs and to do the quality research.