The call number range for Edgar Allen Poe as an individual author runs from PS2600 through PS2648. Within that range, subcategories break down as follows:
Primary Works:
Poetry (Collected works): PS2605
Poetry (Separate works): PS2606 - PS2611
Fiction (Collected works): PS2612
Fiction (Separate works): PS2613 - PS2618
Secondary Sources:
Criticism of collected and individual works: PS2619 - PS
Biography and general criticism: PS - PS2648
Criticism of an individual work will be shelved with that work and not in the section for general Poe criticism.
Additional books dealing with Poe may be found in the following classifications.
General criticism of American fiction: PS374
Anthologies of American fiction: PS648
Gothic tales: PR830
For the book call number range for primary and secondary works exclusively by or about Edgar Allan Poe, see the left-hand pane.
For a shelf-browsing, call number approach, use the 2008 edition of the Library of Congress Classification for PR, PS, and PZ, located adjacent to the Library of Congress Subject Headings on the green cabinet beneath Shakespeare's portrait on the library's seventh floor. It is an extremely detailed listing that can locate books on specific topics more precisely than can the LCSH, which is useful for locating books on broad subject areas.
The classification for the entire class P of language and literature can be found here:
http://www.loc.gov/aba/cataloging/classification/lcco/lcco_p.pdf