In 2015, Easton Press commissioned Alejandro to create the illustrations for a deluxe edition of the 1886 classic gothic novella by Robert Louis Stevenson: Strange Case of Dr Jekyll and Mr Hyde.
In 2016, the renowned spanish horror & fantasy publisher Valdemar commissioned Alejandro to illustrate Carmilla and other Female Vampire Tales, containing short stories by Edgar Allan Poe, Sheridan Le Fanu, F. Marion Crawford, Manly Wade Wellman, and Théophile Gautier.
In 2017, Penguin Random House once again required Alejandro's art to return to the universe of author John Katzenbach, for whom he had already created several covers of his books. This time, to celebrate the 15th Anniversary of his emblematic novel The Analyst, in an illustrated edition.
In 2021, Alianza Editorial commissioned Alejandro to create the illustrations for Joe Abercrombie's The Blade Itself, in its Spanish edition. The first book of the renowned trilogy The First Law.
In 2022, he worked on the illustrated edition of the classic The Worm Ouroboros by E. R. Eddison, a book that will be published soon in the USA by Centipede Press.
In 2024, he was commissioned by the independent publisher Proudly Bound to illustrate a new deluxe edition of the immortal classic Frankenstein or The Modern Prometheus by author Mary Shelley.
In the meantime, the beautiful project Geralt de Rivia / The Witcher: The Illustrated Edition has started to be published in Serbia. The complete 9 Books of the new edition include around 60 new illustrations and new book covers.