Turret Mage: An Isekai LitRPG (In My Defense Book 1)

Turret Mage: An Isekai LitRPG (In My Defense Book 1)

by J. Drude

4.6 (142)

4.6 stars from 142 reviews


$2.49KU50% off peak

Last checked: May 14, 2026

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Perfect for you if...

  • You love LitRPG progression systems and want to see someone exploit them in wildly creative ways rather than follow the obvious power curve.
  • You're drawn to protagonists who solve problems through engineering and invention instead of raw combat talent or chosen-one destiny.
  • You enjoy stories where the System itself becomes a character, especially when it's buggy, unreliable, and actively unhelpful.

Maybe not for you if...

  • You want a main character who is naturally gifted at fighting or magic—Ryan's combat skills are genuinely weak and that's central to the plot.
  • You prefer fast-paced action over detailed crafting sequences and mechanical problem-solving.
  • You're looking for a complete standalone story; this is book one of a series and ends on significant unresolved tensions.

About this book

When Ryan Kotes awakens on the alien planet Ralqir, he discovers he has a metal arm and receives mysterious messages in his vision. His memories are fragmented, and the System tutorial meant to guide him through his arrival has malfunctioned—possibly triggering the world's apocalypse. Ryan learns he is an Exotic, an ascended being with a connection to the System. However, his abilities to shape metal and infuse objects with mana are not suited to combat. As nightmarish creatures threaten his new home and the dead begin to walk, Ryan must adapt his crafting skills into something deadly. Using his mechanical knowledge and creativity, Ryan transforms his Class into a weapon-building practice, creating formidable munitions and honing his mind itself as a tool for survival. This first volume of the LitRPG series previously accumulated almost 900,000 views on Royal Road.

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Price History

Kindle price over time. Green zones = periods when the book was free.

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Free$2.50$4.99Oct '25May '26
$4.99$4.99

Currently on sale at $2.49 — 50% off peak. Price has dropped 1 time over the last 7 months.

Sales Rank

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#11,544#461,721#911,897Nov '25Jan '26Mar '26May '26

Currently around #56K in the Kindle store — a steady mid-list seller. Sales have softened 117% recently.

Rating & Reviews

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3.5★4.3★5.0★Nov '25Jan '26Feb '26May '26RatingReviews

Currently 4.6★ from 142 reviews

Gaining approximately 24 new reviews per month. Steady word of mouth growth. Rating has dipped slightly from 5.0 to 4.6.

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Free$2.50$4.99Oct '25May '26PredictedMay '26

Actual Predicted

This book is currently discounted at $2.49. It typically returns to around $4.99.

Prices shown in USD from Amazon US. We continuously pull new data to improve tracking. If dates look old, it usually means there has been no significant change since the last data point.

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J. Drude

1 book on Vagrant Press

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