Can you book online Hyatt Hotels?

I have been planning to surprise my girlfriend with a holiday in Hawaii this summer. We are together two years now and I know she would be thrilled of going there. Also, I think that Hyatt is the best solution. I assume there are Hyatt hotels (well, at least one). The problem is I do not want her to find out anything about that so I need to know can you book online Hyatt hotels?

Yes, of course. You can visit their official site and find out anything you need to know about the terms, prices, accommodations etc. Anyway, I think there are 2 Hyatt Regency hotels (in Maui and Waikiki), and one Grand Hyatt in Kauai. So, take your pick. My friend has been staying at Waikiki Hyatt and said that it was a vacation of lifetime. He would like to go there again, but said that the prices are a bit too high.