These handbooks and directories describe commercially and non-commercially available tests and/or provide reprints of experimental tests. It is not an all-encompassing list, but these provide good places to start.
Library resources about psychological assessment are often found using the following subject headings
To find books about tests assessing particular psychological traits, characteristics, or states try a Keyword search in Books/Media and combine the trait with the phrase testing OR diagnosis. For example, ability AND (testing OR diagnosis), depression AND (testing OR diagnosis), or eating disorders AND (testing OR diagnosis). You could also OR-in assessment or similar testing terms.