I'm not planning to constantly update about it because the list of all his shiurim (including Kav HaYashar) appear here:
Rabbi Zecharia Wallerstein | TorahAnytime.com
So people can just check out that list from time to time to see if there's a new shiur (that's how I'm planning to inform myself too).
So far, three shiurim appear on that list:
- Kav Hayashar Part 1: www.torahanytime.com/#/lectures?v=165207
- Kav HaYashar Part 2: www.torahanytime.com/#/lectures?v=167088
- Kav HaYashar Part 3: www.torahanytime.com/#/lectures?v=168074
As Rabbi Wallerstein himself says in the second shiur, it's not for everyone.
As inspiring as the Kav HaYashar is, some people find the Kav HaYashar as disturbing as it is inspiring.
But a lot of us find it fascinating & inspiring overall.
If you'd like a taste of the Kav HaYashar, posts about it have appeared on this blog. You can click here to see them:
www.myrtlerising.com/blog/category/kav-hayashar
(The first 2 posts as you scroll down only have minimally to do with the Kav HaYashar. You need to scroll down beyond them to get to the full-blown Kav HaYashar posts.)
UPDATE:
The entire book is available at Sefaria in Hebrew-English here:
www.sefaria.org.il/Kav_HaYashar%2C_Author's_Preface.1?lang=bi&with=all&lang2=en
Or just English:
www.sefaria.org.il/Kav_HaYashar%2C_Author's_Preface.1?lang=en&with=all&lang2=en
Or just Hebrew:
www.sefaria.org.il/Kav_HaYashar%2C_Author's_Preface.1?lang=he&with=all&lang2=he
(For some reason, could not get the auto-link to work, so you'll have to copy & paste the links. Sorry!)
B'ezras Hashem, may this series please help us all to do teshuvah.