Capillary gas adsorption chromatography, written by Professor Berezkin and J. de Zeeuw is one of the most thorough textbooks put together on the topic. The book is very well laid out, appealing to both novice and advanced chromatographers. Be warn that there are a lot of new terminologies introduced by Professor Berezkin. Chapter 7 highlights the importance of adsorption chromatography in gas chromatography and will give you a flavour of what this branch of chromatography can do. All in all, a good reference book, read a chapter, read a couple chapters, read the whole book and make sure you read it once in a while after that so that you don't forget the importance of adsorption chromatography in analytical science.