New open access book of Intech entitled “World Cotton Germplasm Resources” (ISBN 978-953-51-1622-6) has just been published online. Book has compiled 11 peer-reviewed chapters from several leading cotton growing countries including Australia, China, India, Pakistan, United States of America, and Uzbekistan. It provided updated information on the current status and detailed inventory of available cotton germplasm resources. All chapters also targeted to address the past and current progress; enrichment of collections with novel germplasm resources including Bt-cotton, RNA interference and markers assisted selection lines; new trends and molecular tools in germplasm evaluations, development of database, understanding genetic diversity and its exploitation in cotton breeding; future perspectives of existing collections; critical challenges and opportunities in preserving the cotton genetic resources; and the ongoing multi-national communication and collaboration to enhance the germplasm protection, preservation, and evaluation. This book should be useful reading source on worldwide cotton germplasm resources. The content of this book is freely available for downloading at (http://www.intechopen.com/books/world-cotton-germplasm-resources).