Genji had left them alone again with the weapons, mentioning that he was going to go open a Pseudospace in the special training area so that he could teach them all how to fight. When Silas picked up the book, the moment he did a window appeared, stating the following. 

[hider=Window]
You have obtained the Skill Book teaching HiragaiyaTamashī no Nesshō Skill [i](Soul Burn for you English speaking people)[/i]
[/hider]

Around this time though, after Sasha answered Silas' question, Genji returned, it not really taking all that long to open the Pseudospace below. "Sorry about that, but I am back. The Pseudospace is ready and..." Genji noticed Silas holding the book that he was reading. "Ah, you're interested in the Soul Burn technique? I don't think you could learn it though since it also requires the Hiragaiya Spirit Technique, a technique that a different clan of martial artists, the Hiragaiya clan, practices. We sometimes trade our basic techniques and knowledge with other clans to study them and use the theories behind them to improve our own techniques. I would give that copy to you, but I can't really have that book, since it contains knowledge from a different clan, from leaving this place."

He then looked at the stack of weapons, then back at them. "Anyway, if you have picked your weapons and no longer have any questions, follow me and we can go train you all for a short bit in the Pseudospace."