This edition is undoubtedly the most important to date, since the two masterpieces by L. Carroll - and the no less masterful illustrations by Tenniel - have been joined by the notes and comments of Martin Gardner. The author of this annotated edition, a columnist for "Scientific American" for more than twenty years, an original mathematician and essayist, was perhaps, due to his profession and hobbies, the most appropriate person to carry out this task, shedding new and definitive light on a text complicated but delicious. Not in vain, Charles Dodgson (that is, L. Carroll) was also a professor of Logic and Mathematics, as the annotator, leaving in his books the unmistakable mark of his very subtle humor, interwoven with constant combinations and unforeseen variables. Lastly, the quality of the texts, and the meticulous care with which Francisco Torres Oliver has produced their translation, is joined by the magnificent presentation of the texts and illustrations. We believe that the set constitutes for all this a truly essential edition.