There is, in a way. Rogue Leaders: The Story of Lucasarts has a lot of art and info on all the games (the covers - there are 4 of them - are dreadful though. Why all that yellow? Why Monkey 4 Guybrush?):
Amazon link:
https://www.amazon.com/dp/0811861848/?tag=neogaf0e-20
Edit: Just noticed the prices on Amazon. Jesus Christ! I didn't know this book was so rare. I should seriously consider selling it. It's not worth that amount of money though. Check out the Mixnmojo galleries and secret histories, probably the best collection of a lot of rare art and obscure information (more than is in that book):
https://mixnmojo.com/media and
https://mixnmojo.com/news/All-the-LucasArts-Secret-History-articles-back-online (that last one is a goldmine if you're into this kind of stuff).
It's a good book if you're interested in that era of gaming.
As for a specific Monkey Island book coming out now - it's a bit complicated. Disney owns Lucasfilm/Lucasarts now, but Lucasarts itself doesn't exist anymore. Disney doesn't have any real interest in doing anything with the old adventure games, but luckily thanks to Sony Double Fine is making the recent remakes.
It's
extremely difficult to negotiate with Disney on these things. Double Fine couldn't have done it themselves, they really needed a giant like Sony doing the heavy lifting for them. Double Fine has stated that they actually wanted to do some merchandising (figurines, soundtrack LP's, etc) for their adventure game remakes, but that it's just very hard to get all of that worked out, and that all of that is really unlikely to happen in the near future.
Disney is very protective of their IP, and while a smaller company like Double Fine is obviously interested, they'd need a larger publishing company to get involved, and the market for these things just isn't very large all things considered. It's the kind of project that would attract a smaller, niche focused publisher, but those in turn aren't able to negotiate with Disney. And Disney obviously isn't going to do it themselves - they just bought Lucas for Star Wars (and Indiana Jones).
Edit: Also, not quite the same, but the physical release of Monkey 2 Special Edition had a ton of extra content on the disc. More video footage of Schafer, Gilbert & Grossman recording commentary (some of which didn't end up in the game), and especially a lot of art and storyboards for the cancelled Monkey Island movie (which would later morph into Pirates of the Caribbean).