Yes, I know the book you seek.
'Tis called "The Lost Journal of Indiana Jones". There's no named author other than that of "Henry Jones Jnr."
I have a copy of it, and it's a great little collector's item, and it's not a novel, but a fun little companion to your other books. It quite artistic and even includes a letter from Abner Ravenwood.
Here's a thread on the book, with other Raveners' opinions and reviews, as well as news leading up to it's release.
The only other hard cover book I can think of is "The Greatest Adventures of Indiana Jones". It was published outside of the US, so it's mostly the Raveners in Europe and myself in Australia who managed to get our hands on that one. That's a cute book similar in vein to the Dragonlogy and Pirateology books, with pop up bits and also pull outs like money and maps. Here's a thread on that with some pics:
If it's not that one, you might want to be a bit more specific as to the description of the hardcover book you're looking for.