The first volume of a new "Caves of Thailand", compiled by Martin Ellis, has just been published covering the northeastern "Isan" region and the south-eastern provinces. 

This volume has over 1,100 caves, rock shelters, stream sinks, resurgences and other sites which may be of speleological interest from the provinces of Amnat Charoen, Bueng Kan, Buriram, Chachoengsao, Chaiyaphum, Chanthaburi, Chonburi, Kalasin, Khon Kaen, Loei,  Mahasarakham, Mukdahan, Nakhon Nayok, Nakhon Phanom, Nakhon Ratchasima, Nong Bua Lam Phu, Nong Khai, Prachinburi, Rayong, Roi Et, Sa Kaeo, Sakon Nakhon, Sisaket, Surin, Trat, Ubon Ratchathani, Udon Thani and Yasothon. 

This 311 page, A4 book also includes a brief caving history of  the region, 78 surveys and a bibliography with over 200 references. 

It is available from print-on-demand publisher Lulu at http://www.lulu.com/shop/martin-ellis/the-caves-of-eastern-thailand/paperback/product-23336645.html for £19.99 plus postage and packing.