One more proposal
There exists 3 buttons for search for the books in sites.
They works for Original name, Author and ISBN.
I found useful to make ONE button responsible for this kind of search!
Because for example, when you need to find a book of Ivanov "Tanks" (just a sample) when both "Ivanov" and "Tanks" are so common words, that individual search for them results in too giant amount of titles whenever you perform search for "Ivanov", or "Tanks".
I can suggest to make a special search form, where user can type keywords, or author, or data from other fields (frankly, except 3 fields used now I can suggest to add "Date", which must help in the case of multiple editions.)
Also this search form must contain field for the direct link to the book, if the search can't locate the book itself.
Just like it is done for Ozon, but doesn't work for Libex, for example.
Hope it's not too complex for implementation...