Vulcan's Forge

It begins deep beneath the Pacific Ocean, where a nuclear bomb strikes at the fiery hot heart of the earth. Churning, spewing boiling lava, a volcano rises with unnatural speed from the ocean floor -- the source of a new mineral that promises clean, limitless nuclear power.

It continues in hot spots around the globe: Hawaii, where a secessionist movement is about to turn violent and the American army may be asked to fire on U.S. citizens; Washington, D.C., where the subway system becomes the site of a running gun battle; the Far East, where disrupted diplomatic negotiations jeopardize world peace; a rogue Russian submarine, circling the infant volcano.

Caught in the middle is Philip Mercer, a geologist and a one-time commando with shady contacts in all the right (or is it wrong?) places. When Mercer learns that the daughter of an old friend is being kept under armed guard in a local hospital, he vows to rescue her, not knowing that this is the first step in unraveling the fantastic secrets of Vulcan's Forge.

Standard and Primary covers are widely available through general retailers. They often have higher print runs and can be cheaper, especially during sales.

In contrast, Direct Market (DM) and variant covers are primarily sold in comic shops. DM editions tend to have more limited availability and may be more valuable to collectors.

The main differences lie in artwork style, availability, price, and collector appeal. Ultimately, the choice between standard and variant covers depends on personal preference, budget, and individual collecting goals.

Comic book enthusiasts have various formats to choose from when collecting their favorite stories.
Here's a brief overview of the main types:

Omnibus

• Large, hardcover collections
• Usually contain complete runs or extensive story arcs
• Typically 800-1000+ pages
• Higher price point, often €100-€150

Oversized Hardcover (OHC)

• Similar dimensions to omnibus, but thinner
• Collect shorter runs or story arcs
• Usually 300-600 pages
• Priced between €30-€50

Hardcover (HC)

• Standard-sized hardcover books
• Collect 6-12 issues typically
• Similar dimensions to single issues, but with a hard cover
• Priced around €25-€35

Trade Paperback (TP)

• Softcover collections
• Standard comic book size
• Usually collect 4-6 issues
• Most affordable option, typically €15-€25

Other Formats

• Absolute Editions: Oversized, deluxe hardcovers (mainly DC Comics)
• Compendiums: Massive paperback collections
• Graphic Novels (OGN/GN): Original stories not previously released as single issues

The choice between these formats often depends on personal preference, budget, and collecting goals. Omnibus and OHC editions offer larger artwork and more content but at a higher price, while TPs provide a more affordable way to collect complete story arcs