The listing, The Purple Emperor by Herbie Brennan (2008, Paperback, Reprint) has ended.
Great Condition book from a Smoke-Free Home
Synopsis
Archfiend Lord Hairstreak has managed to recover nicely from defeat in this sequel to THE FAERIE WARS. With vile conspirators Chalkhill and Brimstone, he has illicitly brought the Purple Emperor back from the dead, and through him controls all Faerie Realm. Meanwhile in the Analogue World (ours), Henry uses the portal in search of Prince Pyrgus and his sister, Blue. Desperately trying his friends, he learns that the two royals have been banished, powerless, to far off lands. With the help of Mr. Fogerty and the remarkable Madam Cardui, the three create a crack plan to win back the kingdom.