This book is the textbook for my information retrieval digital libraries class this quarter. And boy does it read like a textbook! It is dry and dull, but it is also an excellent source of information and current debates/ideas about what information retrieval is and how you should evaluate it. It has great references for further exploring each areas and makes for a valuable reference book. (Though being me I did read it cover to cover). I felt parts definitely went into more detail on the technical side than was necessary. Still useful information to have. In addition to the information retrieval side of things it also goes into quite a bit of depth about information organisation within libraries, and cataloguing and classification. I would almost say it does this better than Chowdury's other book, "Form the shelf to the web" which was the required reading for my cataloguing and classification class. I borrowed my copy from the work's library but will likely end up buying my own as it seems like a very useful reference book to have (at least this term).