TIP: the best online source for knowledge on the value of your books is--
UPDATE: Get there BY 6:15 to "Meet up" -- at the back row of seats then at 6:15 we go as a group to some better seats, otherwise you may end up seating yourself alone. Actual presentation begins at 6:30 at this "Lecture Hall". Meanwhile, share your books for feedback & socializing.
Lecture Hall is capacity 220 people so get your better seats & be on time. This event is well publicized. Main Branch at level L2. From the parking garage take the lift to G then descend to L2.
Free appraisals of one of your books from this expert book dealer after the lecture according to the link posted below. That is also your socializing opportunity. Incidentally gives you info about the nature of the value of antiques in general.
Please arrive early & introduce yourselves. (part of the fun is finding each other, by asking: are you with the Nerd Fun Meet up? That is a great conversation starter with anybody.)