This book covers the skills necessary for a classifier using the Library of Congress Classification scheme (LCC), whether at a professional or a paraprofessional level. It is equally suitable for use by library students in colleges or universities, and others who are studying classification by themselves, either with a specific goal or as part of their continuing professional development.
Truthfully, I skimmed this just to refresh myself on how LC call numbers are formulated (and now everyone who is not a librarian has fallen asleep during that sentence). Seems like a good library school coursebook for an intro to LC, though - although I would hate to have to do the exercises in it. Ugh. Exercises.