I think he will and will be trapped in the house which he then destroys
What happens is he becomes the New Architect (temporarily) and rebuilds all of existence after the first Architect destroys it all to commit suicide.
"Lord Sunday" is the seventh and final book in Garth Nix's "Keys to the Kingdom" series. In the book, the protagonist Arthur Penhaligon must confront the titular character, Lord Sunday, who is the ruler of the seventh part of the House. Arthur faces new challenges and revelations as he strives to fulfill his destiny and reclaim the Will and the Architect's Keys to save the House.
The ISBN of Lord Sunday is 9781741145915.
Lord Arthur Russell was born in 1825.
Lord Arthur Russell died in 1892.
Lord Arthur Chichester died in 1840.
Lord Arthur Chichester was born in 1808.
Lord Arthur Lennox died in 1864.
Lord Arthur Lennox was born in 1806.
Lord Arthur Hervey died in 1894.
Lord Arthur Hervey was born in 1808.
Lord Sunday was created on 2010-02-01.
The planned date for lord Sunday is currently march 2010