Complex sentence: The Growing Assault on Truth & Memory is a 1993 book by Deborah Lipstadt which led to a libel action when David Irving objected to Lipstadt calling him a Holocaust denier (see Irving v Penguin Books and Lipstadt).
Split into simpler sentences: The Growing Assault on Truth & Memory is a 1993 book which addresses Holocaust denial by Deborah Lipstadt. It led to a libel action when David Irving objected to Lipstadt calling him a holocaust denier (see Irving v Penguin Books and Lipstadt).