Each time a new biography of Steve Jobs is published, we learn a bit more about the life and times of the Apple co-founder. Such is the case with Becoming Steve Jobs: The Evolution of a Reckless Upstart into a Visionary Leader, a telling biography from Brent Schlender and Rick Tetzeil that offers plenty of insight and even debunks some of what was included in previous works on the matter.

In the new book, current CEO Tim Cook said Walter Isaacson's biography did Jobs a tremendous disservice. Cook described it as a rehash of stuff that had already been written and focused on small parts of Jobs' personality. The person Cook said he read about was someone he would never have wanted to work with.

Another revelation highlights just how close Cook and Jobs really were. According to the biography, Cook offered a portion of his own liver to Jobs after learning he shared the same rare blood type as his ailing colleague. Jobs, however, turned down the offer.

The biography also claims that Jobs discussed the possibility of buying Yahoo with Disney chief (and close friend) Bob Iger. Jobs also reportedly urged his friend not to act on an offer to join Google's board; Iger ultimately took his advice and accepted a seat on Apple's board in 2011 shortly after Jobs died.

The new biography goes on sale March 24.