This model was build for a request of the San Diego public library. With a lot of kindness, the owner of the right (warning : see the licence terms that are not the same as my others models) let you download and print this model for free as long as you didn't touch the geometry of the model (apart the scale that you can change)
this model can be printed in 4 hours with a 0.2mm layer, 12% infill and 2 perimeters. if you change the scale to x0.8, you can print it in 3 hours (same parameters)
have fun, and don't forget to Read...
a beautifull timelapse from umasanjp (thanks man !) on his great zortrax.