This book not only covers the major, popular birdwatching sites of both Peninsular Malaysia and Malaysian Borneo, but lots of wonderfully obscure, little-known areas as well.
Descriptions of all sites are accompanied by a sketch map, details on access and facilities, and long lists of birds to be seen there - grouped according to how easy/hard they are to see.
A must have for all birdwatchers going to Malaysia, and indeed very useful for anyone interested in nature reserves of the country.
While marked out of print here, this book is still available cheaply on Amazon's UK site!