I will probably use it as a journal on my next holiday, or I may give it to someone deserving, to be used as a diary, travel journal, sketch book (although this is not the best kind of binding or paper for that), or recipe book.
A woman in my bookbinding group has been covering books with salmon-skin leather, which has an even cooler texture, but when I went to the leather shop to look at skins, the only salmon leather they had didn't have a nice texture, so I didn't buy any.
I did buy some other kinds of leather to use on books: a small pale golden-tan goatskin (morocco), a red-dyed spotted wolffish skin and a lizard skin that I would love to use in one piece to cover the spine of a book. It would have to be a big book, like a photo album or a scrapbook. I also saw some snake skins, but decided not to buy one until I have the right book for it. They also had some cool crocodile skins, but those were unfortunately too lumpy to be used to bind books, but I think a piece of such skin would make a fine embellishment on a book cover (provided the book was not to be stored in a bookcase where it might dent the other books...).