Google is a general, all around search device. 

It's fine for wide swath searches, but if you are trying to dip deep and look for some specialized and reliable sources, you may want to look elsewhere. 

Robots using algorithms create Google searches. All this means is that everything Google looks for is based on your previous preferences and searches. A new search will yield results using what you already like to know. 

These results are limited and don't offer the user the best possible information.  

Bottom line--you are not getting unbiased results. The way around this is to look elsewhere such as going to other search devices such as Yahoo, MSN, AOL and or Lycos. There are many other types of search vehicles, known as portals or directories. 

The difference between a "Search Engine, portal or directory will make a big difference on your results. 

Search engines, such as Google, rely on an automated system with your history coded into it, thereby delivering information based on what you have fed into it. 

Portals were originally designed as gateways to other Internet resources. However now they have become destination sites with popular information such as news, shopping, entertainment and Internet services including E-mail. 

Directories are classified a listings of Web sites. A directory will have records for sites placed within a hierarchical system. The classification of sites is typically performed by human editors and is searchable by the category names, titles and descriptions. 

While there are some specific distinctions, there is a lot of blurring between search engines and portals today. Google has joined in with Yahoo and Aol in offering E-mail, news and entertaining.  

Yet, a same search performed on all three will yield some differences in the result. 

Don't limit yourself to just one "book." Take a broader approach for a fully comprehensive search experience.