Google book search will give you:
1) limited full-text access to books that are available for purchase
2) full-text access to books available in the public domain
Please note that some searches will direct you to articles that require you to purchase them or try and locate through your library. SHS will not always have access to this content. If you find something that looks amazing try the EBSCO database or see Ms. Hopkins but please note that it can sometimes take a while to get items through inter-library loan.