Tide of Shadows (The Gus Harper K9 Thrillers Book 1)

Tide of Shadows (The Gus Harper K9 Thrillers Book 1)

by P T Leonard

4.2 (371)

4.2 stars from 371 reviews


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Fans of these authors will like this...

  • Lee Child
  • Tess Gerritsen
  • David Baldacci

Fans of these books will like this...

  • The Midnight Library
  • Camino Ghosts
  • Where the Crawdads Sing

Perfect for you if...

  • You love thrillers with animal companions at the centre. Arty isn't decoration. he's integral to both the action and the emotional core.
  • You're drawn to character-driven stories where the cast feels like a real found family. The Cardinal, the widow, the former SEAL. all matter.
  • You want high-stakes action grounded in a vivid sense of place. Malta's beauty contrasts with the darkness beneath, and that tension fuels the plot.

Maybe not for you if...

  • You prefer fast-paced thrillers that skip character development. This one lingers with its people, which some readers find slow.
  • You're uncomfortable with human trafficking as a central plot element. The book doesn't exploit it, but it's the core premise.
  • You dislike stories where animals are in genuine danger. Arty faces real peril, and the book doesn't pull punches about it.

About this book

Gus Harper, a military veteran, seeks a quiet life on the water with Arty, his retired war dog. When they rescue a half-drowned woman from the sea—a human trafficking survivor—they are drawn back into a world of danger they thought they'd left behind. Beneath the island's beauty lies a criminal network involving corruption, deception, and ruthless operators. Gus and Arty form an unlikely alliance with a Maltese Cardinal, a widow, a Polish handyman, and a former US Navy SEAL to uncover a trafficking operation stretching from North Africa to Malta's corridors of power. To dismantle the network, they must risk everything on a dangerous plan. The book opens with a prologue set 500 years ago, featuring an island legend of a saint rescuing captives from Barbary slave traders—a story later echoed by Gus and his crew. Themes include loyalty, found family, survival, redemption, and standing against corruption. This is Book 1 in the Gus Harper K-9 Thriller series.

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Free$3.00$5.99Mar '25Apr '25Jul '25Sep '25Dec '25
$0.99$5.99

Currently free. Price has dropped 3 times over the last 9 months. Goes on sale roughly every 41 days. Typically stays discounted for 4 days.

Sales Rank

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#11,447#578,295#1,145,143Mar '25Jan '26Apr '26Jun '26

Currently around #26K in the Kindle store — a steady mid-list seller.

Rating & Reviews

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3.5★4.3★5.0★Mar '25Jan '26Feb '26Jun '26RatingReviews

Currently 4.2★ from 371 reviews

Gaining approximately 23 new reviews per month. Steady word of mouth growth. Rating has dipped slightly from 5.0 to 4.2.

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Free$3.00$5.99Mar '25Apr '25Jul '25Sep '25Dec '25PredictedDec '25

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P T Leonard

1 book on Vagrant Press

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