Mo Willems books in Spanish, especially Cerdita y Elefante
Angela Nguyen books: How to Draw Cute series
Princesa de negro (Princess in Black in Spanish)
Steve Antony books in Spanish: Te Amamos, Sr. Panda, etc.
Aaron Blabey books: Chancho el Pug books, Los tipos malos / The Bad Guys
La casa del arbol books (Mary Pope Osborne's Magic Tree House series in Spanish)
Diary of a Wimpy Kid chapter books
I Survived (graphic novels)
Wings of Fire graphic novels
Chi's Sweet Home series
Sunny Side Up series (graphic novels by Jennifer L. Holm)
Hombre mosca (Fly Guy in Spanish)
Unicorn Diaries series (beginning chapter books by Rebecca Elliott)
Dog Man and Hombre Perro (Dav Pilkey graphic novels in English and in Spanish)
Raina Telgemeier books (graphic novels)
Kayla Miller books (graphic novels)