Books and reading.

There are a number of good books for this class. Two I recommend are:
1) Pierret's Semiconductor Device Fundamentals,
2) Streetman and Banerjee's Solid State Electronic Devices (which is the one we used last year). 

I think that reading from the Harris book that you used for 102 would be confusing and not a good idea. That book uses a very different approach which does not mesh at all with the way we are describing bands and states for this class.

We are using a band theory approach. (Sometimes called tight binding or LCAO.) In this approach, which meshes well with the actual nature of semiconductors and metals, bands are associated with atomic states and atomic energy levels. Beware of reading about free electron approaches. They are useful and relevant in some situations, but can be confusing when you are first learning about crystal states, energies conductivity, etc from a band theory-based point of view.