Synopsis The "Lost Saraswati Civilization" is an edited work of Deo Prakash Sharma and madhuri Sharma. Till today around 2668 Harappan and its associated sites have been reported in north-West south Asia in which 1100 sites are located on dry banks of river Saraswati and its tributaries. During 3rd millennium B.C. Hindon was a tributary of river Saraswati and around 250 Harappan sites have been reported on the banks of river Hindon, mandi, Hulas, Alamgirpur, Sanuoli Toppal are important Harappan sites located on the bank of river Hindon which is now a tributary of yamuna. We have excavated 208 Harappan sites. Ganweriwala is the largest (350 hectares) Harappan site located on dry bank of Saraswati (or Hakra) in Cholistan (Pakistan). Few excabvated harappan sites in Saraswati region are Desalpur, Dholavira, kalibangan, Bhirrana, Barror, Dhalewan, Banawali, Kunal and Rakhigarhi. Saraswati or Hakra or Ghaggar was a holy river. From 6000 B.C. to 1800 B.C. Saraswati flowed from south of Siwalik through Himachal, Haryana, Punjab, Northern Rajasthan and Finally was joining Desalpur in Arabian sea. Due to tectonic disturbance in the Siwalik, Saraswati river course moved streadily in the clockwise direction eventually flowing eastsouth east rather than south. The stream captured by the emerging Yamuna river compromised its water shed and river Saraswati began to dry up around 1800 B.C. Archeologists observed after analyzing literature and remote sensing images that river Saraswati flowed through Rajasthan desert. This lost river Saraswati was 1500 km. Long and between 3 to 12 km. Wide. This volume includes 27 papers.