Google's PageRank and Beyond, The Science of Search Engine Rankings, Amy N. Langville, Carl D. Meyer
Information Retrieval : Algorithms and Heuristics (The Kluwer International Series on Information Retrieval) (ISBN: 1402030045) David A. Grossman, Ophir Frieder
Understanding Search Engines: Mathematical Modeling and Text Retrieval (Software, Environments, Tools), Second Edition (Paperback) by Michael Berry, Murray Browne
Information Retrieval: Algorithms and Heuristics (The Information Retrieval Series)by David A. Grossman, Ophir Frieder Jon Kleinberg, HITS/PAGE-RANK

Subject Keywords

{,Web ,Traditional }Information Retrieval Latent Schematic Indexing (LSI)

{Meta}Search Engines

Emacs Search Engine
Plenty of people have posted emacs manuals online. Here is an index.
Manage Search Engine