On a more current day note, my husband and I were recently told about a murder mystery series that takes place in various national parks, a bucket list item for us (we've been to 36 of our national parks to date, leaving 33 still to go). The protagonist is named Anna Pigeon, the author Nevada Barr. There are about 17 in the series to date, and we're already on number nine, all for free via library e-books, nicely. Well written, fun to read, and we've learned a ton about the inner workings of that big bureaucracy we call our National Park Service!