Illustration and poster 'CSIC at the Bookfair of Madrid 2023'. With hundreds of books of science in every area of knowledge, Editorial CSIC, the editorial of Consejo Superior de Investigaciones Científicas (CSIC, Spanish National Research Council) have an important role and big presence at every year Bookfair of Madrid. This year I was honored and invited by the Vicepresidenta Adjunta de Cultura Científica y Ciencia Ciudadana, Pura Fernández, to participate with an illustration and a poster for the CSIC presence at the Bookfair.