I have a complete hardcover collection of Charles ens works, Peter Fenelon Collier and Son, New York, MCM. The collection is in very good shape. What is it's value?

Hello! I have not noticed anyone on this forum who is an expert book appraiser. There may be someone who will stop by and answer your questions, but in case they don't, I am attaching some links that might help you. Good Luck! :)

Book Appraisals (Rare Book and Special Collections Reading Room, Library of Congress)

BOOK APPRAISALS & VALUATIONS - Professional book appraisals

Book appraisals of rare books, collectible books