Timeless strategy and discipline — the books that shape the Kratonis mindset. Read two complete warrior classics right here on this site.

Japan's most legendary swordsman — undefeated in 61 duels — wrote this in a cave near the end of his life. Five scrolls: Earth, Water, Fire, Wind, and Emptiness. His message: master the fundamentals, keep a calm and fluid mind, cut away everything useless, and practice with total sincerity.
For your training: show up every day, master the basics before chasing the fancy stuff, stay calm when the workout gets hard — and do nothing that is of no use.
"You must understand that there is more than one path to the top of the mountain."
"Do nothing that is of no use."
The Book of Five Rings itself is centuries old, but every modern English translation is still under copyright — so there's no free full text we can legally host here. Pick up a copy from your local bookstore or library; it's worth owning.
Days before his death, Musashi wrote 21 short precepts — his final summary of the Way. Two minutes to read, a lifetime to practice:

The oldest strategy manual in the world, written 2,400 years ago — and still studied by coaches, executives, and competitors everywhere. Its core lesson: the battle is won before it begins, through preparation, knowledge, and discipline. "Know yourself" means know your body, your strengths, and your limits.
For your training: plan your workouts, prepare your meals, respect your recovery. Victory loves preparation.
"If you know the enemy and know yourself, you need not fear the result of a hundred battles."
"Victorious warriors win first and then go to war, while defeated warriors go to war first and then seek to win."
Read the full book right here — The Art of War
The complete 1910 Lionel Giles translation, hosted on this site. Also available at Project Gutenberg.

"The Way of the Samurai is found in death" — not a love of dying, but total commitment: hold nothing back, live each moment completely. Written as some 1,300 short lessons on loyalty, discipline, and presence of mind.
For your training: commit fully to every rep, every set, every meal choice. Half-effort is the only true failure.
"The Way of the Samurai is found in death."
"Matters of great concern should be treated lightly; matters of small concern should be treated seriously."
Hagakure itself is centuries old, but modern English translations are still under copyright — so there's no free full-text we can legally share here. Pick up a copy from your local bookstore or library; it's worth owning.

Written in English by a Japanese scholar to explain the samurai code to the world: rectitude, courage, benevolence, politeness, truthfulness, honor, and loyalty. The book that introduced bushido — "the way of the warrior" — to the West.
For your training: this is the mindset behind the muscles. Courage without benevolence is thuggery; discipline without honor is empty. Read how the samurai trained their character the way you train your body.
"Chivalry is itself the poetry of life."
Read the full book right here — Bushido: The Soul of Japan
The complete 1900 text, hosted on this site. Public domain via Project Gutenberg.
The original works are all in the public domain. The Art of War's full text above is hosted by our friends at Project Gutenberg; for the other two, their modern English translations are still under copyright.
The Art of War and Bushido are in the public domain — their complete texts are hosted right here. The Book of Five Rings and Hagakure are centuries old, but their modern English translations remain under copyright, so we point you to the bookstore for those.