Even though some of the titles were fairly new, and easily replaceable, others were not. Merlin was also extremely protective of his books. Or possessive. Both? He picked up a copy of Astronomy for Amateurs, this one the English translation of the original French, and flipped through the pages. Although some of the information contained was speculative and since disproven, the writing was something that he thought Rosario would appreciate. Especially the bit about Urania.
And he had a book Urania had written herself in there too, for something more modern. (Modern! ha!)
"The books stay," he said, setting the book down again, "but you can make copies of pages. I will allow you access to my library to read them, of course."