Books. Elsevier, science and health publisher (and part of RELX), has completed a deal to sell its Portuguese book portfolio to Grupo Editorial Nacional (GEN). The portfolio includes over 1,000 book titles. The translation of other Elsevier titles into Portuguese and their distribution has also been licensed to GEN. GEN has been established for twelve years and this represents its twelfth acquisition, enabling the company to become a leading science and technology publisher in Brazil. Elsevier will focus only on digital markets in Latin America.