Nic Bishop has a great collection of informational books. Frogs is one of my favorites. The photographs are very compelling. All age groups will find this book filled with interesting facts and information. There is even a fabulous fold out 2-page spread that shows a frog leaping into the air.
This text is great for showing how ideas can be grouped under main ideas that are not explicitly stated. Another great activity would be to look at one page of text and figure out what are the important vs. interesting facts on the page.
The short sections are also wonderful for summarizing. Summarizing nonfiction can be difficult and this text is short and interesting enough to make students want to summarize the important parts.
There are other informational books by Nic Bishop which would be great companions to this one.