User:DerekMor/monobook.css

.mw-header-container { background: url(https://images-na.ssl-images-amazon.com/images/M/MV5BMTUzMDM4Nzk2MV5BMl5BanBnXkFtZTcwNTcwNjExOQ@@._V1_SY1000_CR0,0,685,1000_AL_.jpg); }