My understanding is that he is not publishing a book on abortion. The book he promises is his autobiography, in which he says he will tell the whole story of these events. If that is the case, I doubt it will be available any time soon.
The audio CDs on abortion he is promoting as the first product of The Black SheepDog’s ministry for profit may very well be reedited from his old Fr Corapi talks, with any specifically Catholic references either deleted or downplayed. So if you have, or have heard, his old talks, you will probably not be getting anything new. Unfortunately, there will be no way to preview these tapes to determine whether they are recycled or not; you will have to purchase them at full price, and most likely with the previous Santa Cruz no refunds under any circumstances policy in effect. There may be brief sound bites posted at his website as a promotion.
Various opinions on whether it would be prudent to purchase his old materials (you have till 5pm Eastern today to do that, based on the countdown clock) or new TBSD products have been shared on this and other threads and Facebook pages. Whatever he says about his new era, he is in disobedience and has been found by his superiors to be unfit for ministry. I would take that as an absolute No on purchasing materials, because that money will only go to promoting that disobedience. There are many, many worthy sources of materials promoting the Gospel of Life, a good many of them nonprofits who donate proceeds to actual anti-abortion action.
On the question of whether there is still some grace to be gained by reviewing his old materials, advisors are split. It is true that he did not teach heresy–but if he did not live it while he was preaching, he most certainly is now. If you can separate the message from the man–who, we are learning to some degree of certainty, was not just a flawed instrument as we all are, but a deliberate liar–that’s between you and your conscience.
If you want to support his soul as he moves forward, prayer is the best (and to my mind, only) way to go.