In fact in Soy un escritor frustrado, themes which are absent from José Ángel Mañas' first two novels, become permanent fixtures in Sonko95, Mundo Burbuja (2001) and Caso Karen (2005), in particular, his meta-literary character.

Soy un escritor frustrado in fact describes his own writing process and he enjoys along the way reflecting on the highs and lows of success, which Mañas himself has famously experienced first hand.

In Caso Karen, Mañas rails without mercy against the modern literary scene and its most relevant institutions: authors, agents, publishing houses, prizes and conferences.

[4] In Montxo Armendáriz's adaptation, some of the intellectual references from the novel are missing, such as, the endless appearances of Bret Easton Ellis's American Psycho in the conversations between Carlos and Roberto.

Mañas' novel Soy un escritor frustrado was made for the big screen with the title Imposture, directed by Patrick Bouchitey, and premiered in 2005, the same year that Caso Karen was published.