Kastle searched for resources to explain his PTSD to his children, but found the options lacking. So, he wrote a book and started a Kickstarter campaign to raise the funds to hire an illustrator and get the book published. The campaign met its $3,000 goal in just eight hours, and eventually swelled to more than $6,000.

“In my book I talk about the fire inside dad’s chest. To me, that’s what it feels like,” Kastle said.

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