In addition to simple searches for the author or text -- like Adventures of Eovaai -- you can try adding terms like (handbook* or companion* or guide) to find overviews or crit* to find secondary sources. Farm the official subject headings for more terms and use parentheses and "or" to create searches like:
Remember to always check the official subject headings for more ideas and a sense of the hierarchy of topics.
Once you've found a successful search within Scholar OneSearch, repeat that search in WorldCat, which is a union catalog of almost all libraries in the U.S. plus some international. Change the sort to relevance for the most complete picture. If you find a book that seems useful, request it using InterLibrary Loan.