I cracked open a paperback of The Incrementalists by Steven Brust and Skyler White and:
Huh, apparently a child had been checking whether their pen worked? Oh well, that’s what happens when you buy used books.
And then I flipped to the back cover:
Uhm.
Right.
Are either Brust or White doctors, by any chance?
I cannot speak to his other occupations, but at this link https://www.fleurfinebooks.com/product/16420/Welcome-to-Bordertown-Signed
you will find a photo of Steven Brust signing books in the store shown on the label of your book!