Sacajawea: A Native American Heroine Book

Not only entertaining with its over-the-top yet practical dialogues, but also extremely useful in the way it teaches. Learners are more encouraged to read/listen to dialogues before glossing over the monolithic bundles of phrases and extensive translated terms that are packaged just after the dialogues.
Well put together and planned, starting with basic and shallow things to learn off-by-heart, and then ending on the cases and the future tense, striking a chord with the reader as we plan our futures with Icelandic.
Not essential but very useful, especially for those who do not have any experience with noun cases or extensive verb conjugations.