Where a book can be found in a library?

In the table of search results in the last column on the right (Location or Umístění header), you can learn  in which libraries the book is available. Clicking on the library name will display a table of all copies available in a given library.

In the Signatura column, you can see where the book is placed (such as the shelf no.), the Signatura-2 column will provide you with the number of a particular book.