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Collin's new memoir,  In the Shadow of Eight: Surviving the Reality of My Childhood,  - which came out earlier this month - reveals a slew of allegations made against his mother, claiming physical and emotional abuse throughout his childhood.

Collin - who is one of the sextuplets - shared how his relationship with his siblings has become strained, and that he hasn't talked to them in 10 years.

 I love them very much, and I want them to know that what was done to us as children is not normal,  he shared with Page Six earlier this month.

In his memoir, the 22-year-old wrote,  I sincerely love all my siblings. If any of them ever read this, I hope they know that. 

7 In his memoir, Collin wrote  …I sincerely love all my siblings. If any of them ever read this, I hope they know that.  (All eight Gosselin children seen above) Collin Gosselin/TikTok

7 Collin has been estranged from his mother since 2016 and his father Jon was granted legal and physical custody of Collin in 2018. (Gosselin children seen above) kateplusmy8/Instagram

Collin has been estranged from his mother since 2016, when she sent him to live in a behavioral health institution at age 11 for alleged behavioral issues.

Jon ultimately obtained legal and physical custody of Collin in 2018 after getting him out of the facility.

The Gosselin father also obtained custody of Hannah after she left Kate's home, while the remaining sextuplets - Aden, Joel, Alexis, and Leah - continued living with their mother along with twins Mady and Cara.

If you or someone you know is affected by any of the issues raised in this story, call or text BEGIN the National Child Abuse Hotline at 800-422-4453.