Each issue of the comic also includes a chapter of a short illustrated prose prequel called Allan and the Sundered Veil, which features Allan Quatermain, John Carter, H. P. Lovecraft's Randolph Carter, and the Time Traveller from H. G. Wells' The Time Machine.
A painting of Nemo's submarine, the Nautilus, in the background of the cover of volume one also bears Hallward's signature.