Marine geologist Ballard was among the first to do a serious exploration of the Titanic. This trio of titles chronicles his investigations of other famous submerged wrecks. Each features numerous period and modern paintings and pix, including many cool but creepy underwater shots of the ships in their watery graves. Prices on these books when first released in the 1990s ranged between $35 and $45. Copyright 2007 Reed Business Information.