M. Zachary Sherman Books

Depth charge
Depth charge

By M. Zachary Sherman

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Lieutenant Aaron Donovan of the Office of Strategic Services embarks on a dangerous mission to get aboard a damaged German submarine and obtain the newest codebooks for the German Enigma cipher mac...

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Emergency ops
Emergency ops

By M. Zachary Sherman

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Captain Anne Donovan's field hospital in NhaTrang, Vietnam, treats many wounded soldiers, but when one of her patients is somebody she recognizes her emotions threaten to overwhelm her.

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Heart of the enemy
Heart of the enemy

By M. Zachary Sherman

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Lieutenant Commander Michael Alexander Donovan and SEAL Team Two are on a dangerous mission to capture a known terrorist and gun smuggler near the Iraq-Syria border--but are they being deceived by...

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What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.

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