I do not consider HP books as "liberal", in fact they agree with conservatives alot in the areas of personal responsibility, accountability for your own actions, respect, honor, honesty and particular in your judgements of others, natural wisdom, forces of light and forces of darkness, envy, pride, deceit, etc. etc.
This book might be a great seller like the HP books, but I do not think they are competing for conservative minds. They both have their merits, in my view.
Order of the Phoenix seemed to go very strongly against the liberal anti-gun message.