Criteria Search Query

I have four criterias in my .aspx page. They are "First Name, Last Name, Title, Year". I have a Book and an Author table. The Author table would contain all the author's information and the Book table contains all the books information such as title, publisher, subject, and so on. So here's what I'm trying to do.

I want to write a transaction statement that will query the four criterias above if the criteria textbox is not black. So for example, when the user click the submit button, all the four criteria fields are filled except Year. That means the query would search the Author and Book tables for "First Name, Last Name, Title" but not "Year" for any potential matches. I also wanted to use "Like" instead of "=" for a wider search.


Actually I'm trying to create a store procedure that will accept those four criterias and search the tables based on those criterias.

Any help is appreciated.