To find books, DVDs, maps, sound recordings, manuscripts, and much more - everything except articles - use a library catalog.
OskiCat = most UC Berkeley libraries
MELVYL = all UC campus libraries, including all UC Berkeley libraries
What's the difference? more details here
For each item make sure you know the name of the physical library, call number, and whether or not it's checked out, library use only, etc.
Sample Searches in OskiCat
benito perez galdos
benito perez galdos criticism and interpretation
modify search: pull down the language menu to the appropriate language
(subject): perez galdos, benito
browse and select from a list of sub-headings
spanish postmodernis* (limited to english)
* = truncation symbol/wildcard child* retrieves child, childs, children, childish, childhood...
Make sure to note the library location, call number, and availability (checked out? on hold?) for each item.