Inkling and Searching Online Textbooks

Inkling has partnered with Google to let readers search all of their online textbooks.  So for example if you write "Inkling + US Civil War" into a Google search engine you will find an entire chapter on the US Civil War.  Here is the next chapter on the Reconstruction.  Thus you could reconstruct an entire US history book (not that you can't find others by looking at my links).