Maureen Callahan's new biography revealing untold Kennedy family secrets SELLS OUT on Amazon, days after becoming No.1 best-seller

• Read an exclusive extract of Maureen's book: 'Untold secrets of JFK's assassination and his addiction to sex revealed'

Author and DailyMail.com columnist Maureen Callahan's bombshell new biography of the Kennedy family has temporarily sold out on Amazon just days after being released.

'Ask Not: The Kennedys and the Women They Destroyed' hit shelves on Tuesday, July 2, and within hours had already claimed the No.1 spot on several sales charts.

Due to massive demand, Amazon said on Thursday that it had now sold out its entire stock of the book — which was serialized by the Mail last month.

A restock is underway and the book can still be purchased on the site — though delivery may take a little longer than usual. 

Alternatively, 'Ask Not' is stocked in all national book stores and is available for sale directly from the publisher.

Days before it was even published and thanks to a large number of pre-sale orders, Callahan's book became the 5th biggest seller of all new releases on Amazon last week.

It is currently the No.1 bestseller in the site's 'Women in History' section. 

Callahan has already received a flurry of rave reviews, including from podcaster Megyn Kelly, who described the biography as 'the must-read book of the summer.'

'There's so many interesting new nuggets on this bizarre family. Trust me, you're going to want to read it and buy it for everyone you know,' Kelly said.

A similarly glowing review in The Guardian praised 'Ask Not' as an 'eye-opening exposé', while Town & Country magazine described it as 'a searing, no holds barred account of scandal'.

Last month, the Mail published four exclusive extracts of the book.

These included shocking revelations such as: untold details of JFK's 1963 assassination; his wife Jackie's second marriage to Aristotle Onassis and the 170-clause prenup they negotiated; unearthed claims that could implicate 'lady-killer' Kennedys in the death of Marilyn Monroe; and a stunning new theory about the 1999 plane crash that killed JFK Jr. and Carolyn Bessette.