A Bolt from the Blue

Third in the intriguing Leonardo da Vinci mystery series known for "capturing the essence of 15th-century Milan".

As court engineer to the Duke of Milan, Leonardo da Vinci turns his superior mind to many pursuits- from outlandish contraptions to the odd murder...

With war looming ever closer, the iron-fisted Duke of Milan calls upon Master da Vinci to invent the deadliest weapon ever-a flying machine. So da Vinci calls in a craftsman who happens to be father to his star apprentice, Dino.

But da Vinci does not know that Dino is actually the craftsman's daughter, Delfina, who keeps her gender a secret to serve as apprentice. But as Delfina worries that her father will prove her undoing, someone murders another apprentice. Now, as her master works his brilliance, Delfina can only pray that no other apprentice- including herself-will fall victim

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