UC Library Search
UC Library Search is where you can find both print books and e-books. For both print and e-books. This is an enormous combined catalog for all University of California libraries, plus libraries around the world! If you find items not owned by UCI, you can use 
to order them via Interlibrary Loan, a free service available to all UCI students, faculty and staff.
E-books Help Guide
Check out this guide for information about finding and accessing e-books
ACLS Humanities E-books*
An online collection of around 5,000 books of high quality in the humanities
Oxford Scholarship Online*
Online books from the Oxford University Press, including over one hundred history titles
Cambridge Companions Complete Collection*
Cambridge Companions are accessible introductions to major writers, artists, philosophers, topics and periods. All are collections of specially commissioned essays, shaped and introduced to appeal to student readers.
HathiTrust
HathiTrust is a partnership of academic & research institutions, offering a collection of millions of titles digitized from libraries around the world.
UC Press E-books Collection
Books from 1982-2004 from academic presses on a range of topics, including art, science, history, music, religion, and fiction.
Open Library
Open Library is an open, editable library catalog, building towards a web page for every book ever published. A project of the Internet Archive.
*UCI access only
America: History and Life*
From the Advanced Search screen, choose "Book Review" as the "Document Type"
JSTOR*
From the Advanced Search screen, choose "Reviews" as the "Item Type." (Better for finding reviews of books at least 5 years old).
Other sources of book reviews:
H-Net Reviews - Reviewing books is a primary mission of of H-Net. While print journals generally take a year or more to review new publications, H-Net obtains and distributes professional reviews in just months.
Reviews in History - Reviews of books and digital resources
*UCI access only