The cover artists for "The Spider" magazine were Walter M. Baumhofer for the debut issue, followed by John Newton Howitt and Rafael De Soto. "The Spider" was published monthly and ran for 118 issues from 1933 to 1943. A 119th Spider novel manuscript ("Slaughter Incorporated") had been completed but was not published until decades later (as "Blue Steel"), a heavily rewritten mass-market paperback with renamed characters (see paperback novels section below). (In 2012, Moonstone Books finally published it as "Slaughter, Inc.", in its original unedited form. The novel was once again reprinted in 2018 by Altus Press as a facsimile edition, this time designed to look exactly like the actual Spider #119 pulp would have looked in the 1940s.)