Solve This!

From the first wheel to the International Space Station, the miracles of engineering are all around us. Think cars, bridges, skyscrapers, and yes – even bubble wrap! Engineers dream up new ideas and bring them to life while figuring out creative solutions to problems they encounter along the way. But how do they do it? Find out in Solve This!
 
In this fun book, kids are confronted with wacky scenarios like this one: You're playing with your little sister when a vulture swoops down and grabs her favorite teddy bear. Mid-flight, the vulture realizes it doesn't care for the taste of fake fur and drops it to the ground. But now the plushie is on the other side of a raging river. How do you stop your sister from crying, stay safe, and save the day? Each challenge invites kids to think creatively to problem solve. Then they can see how different National Geographic explorers tackled the challenge. One of the big lessons? There's often more than one solution!

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