Rabbi D Neustadt referenced a sefer “Titen Emes L'Yaakov” in his “Weekly Halacha Discussion” titled “The Halachic Definition of a Lie”. Can someone tell me where I can obtain this sefer please? (I sent an email to Rav Neustadt without success.)
The book in question is probably from the contemporary, R. Yaakov Chizkiah Fisch.
The full book is online here.