El Pais has their end of year top ten. No real surprises here this year. The better list is the top 4 by genre. In the fiction in Spanish are

1. Así empieza lo malo. Javier Marías. Alfaguara.

2. El impostor. Javier Cercas. Literatura Random House.

3. El balcón en invierno. Luis Landero. Tusquets.

4. Como la sombra que se va. Antonio Muñoz Molina. Seix Barral.

The most interesting is in the Spanish non fiction category. They list Continuación de ideas diversas by César Aira, which is an interesting choice. It is a meditation on writing in a free associative style. Caravana de recuerdos has a review.