Tintin en el Tibet by 
El Templo del Sol by 
Junie B. Jones ama a Warren el hermosoChildren's books are a great way for beginning language learners to develop vocabulary, and to improve their command of the language.
Check out El Increible Nino Comelibros, or Donde Viven Los Monstruos. To find other titles, try a keyword search using the terms "juvenile fiction Spanish."
Graphic Novels and comic books are also another great way to improve your vocabulary and understanding of sentence construction and conversational voice. The WSU Libraries currently have several Asterix and Tintin titles, including El templo del sol and Vuelo 714 para Sidney.
Additional children's titles include:
El mejor libro de palabras de Richard Scarry
Un Pez, Dos Peces, Pez Rojo by 
The Cat in the Hat by 
Junie B. Jones Es una Peluquera by 
Junie B. Jones Tiene un Pio Pio en el Bolsillo by 
Junie B. Jones Duerme en una Mansion by 
