How did Ilse Hermann prepare for Liesels next visit?

With Rudy, Liesel takes a plate of cookies and another book, The Last Human Stranger, from the mayor's house. She encounters Ilsa who is sort of waiting for her. Liesel realizes that the library is hers. Ilsa explains that the books are mostly hers; some belonged to her son. Liesel realizes that Ilsa always wanted to give Liesel the books. Liesel is touched by the idea that the woman owns a roomful of books. Liesel and Rudy eat half the cookies on the way home and share the rest with Tommy Muller.