I do not have fixed open office hours. I generally make appointments (1 hour link or use this link for 30 minute appointments) from 10am - 4pm Mon-Fri, but for students who cannot get to campus or be online during those hours, I will make evening appointments.
During my current medical accommodation to work from home, my appointments are conducted online, usually using Blackboard Collaborate (this is the guest link to meet me there)
My area of research is focused on the longevity/obsolescence of print books and ebooks in academic library collections - basically, once a library acquires a book, for how many years will it likely be used by patrons?