Learning Creo

PTC Learning Exchange is worth a look.

May also help "Demos & Tech Tips" and "Creo Resources" (PTC Academic Program):

http://www.ptc.com/products/tutorials/index.htm

http://www.ptc.com/company/community/schools/projects.htm#creo

As for book specific references, the Roger Toogood series are pretty good, although I haven't read any of his books in years. Sections of the books can be previewed on Amazon and found via google.

http://www.amazon.com/Creo-Parametric-Tutorial-Roger-Toogood/dp/1585038156/ref=sr_1_3?ie=UTF8&qid=1377095588&sr=8-3&keywords=roger+toogood

http://www.amazon.com/Advanced-Tutorial-Creo-Parametric-Releases/dp/1585037567/ref=sr_1_6?ie=UTF8&qid=1377095588&sr=8-6&keywords=roger+toogood

http://www.amazon.com/Creo-Simulate-Tutorial-Releases-1-0/dp/1585037583/ref=sr_1_5?ie=UTF8&qid=1377095588&sr=8-5&keywords=roger+toogood

Not sure if this matters or not but we use CREO Elements/Pro, does the basics change from the different names?

Mike Brattoli of Moen teaches a class at a NE Ohio community college and his book is available on Lulu. I'm not super familiar with the book, but Mike's very experienced and I'd have high expectations based on knowing him.

In coming from SW perspective (I have no Inventor experience), here are a couple of things to keep in mind.

SW is rather forgiving about reference selection, almost encouraging the use of the nearest or most convenient edge when sketching etc. If some thing fails, you delete and re-sketch and things tend to work, mostly. Failures when the model changes are somewhat frequent, but fairly easy to resolve.

In Creo, on the other hand, references are far more important and more persistent. You'll note that Creo will tell you the unique ref ID for each thing you select (edge, vertex, curve, etc.) where SW always simply numbered them as you picked them. Creo rewards deliberate and thoughtful reference choices (SW does not seem to). If you delete and re-sketch, you will almost assuredly create more failures. You want to try to pick the oldest references available (for example, if you have a choice between the edge of a surface or the curve it was built from, pick the curve) try to maintain them as you correct failures. Paying attention to references in Creo will be painful at first, but in the long run you will be rewarded with far fewer failures than SW.

When sketching, you want to constrain your sketch entities to surfaces whenever possible, not edges. Surfaces are more stable references. In SW you cannot constrain to surfaces in sketcher (and many Proe/Creo tutorials gloss over this) so this is an important nuance you would not likely have figured out on your own.

General topics on Grabcad:

http://grabcad.com/questions/software/pro-slash-engineer-wildfire

http://grabcad.com/questions/software/ptc-creo-elements

http://grabcad.com/questions/software/ptc-creo-parametric

Check also thise:

http://www.e-cognition.net/pages/Tutorials_WF5.html

In my opinion the last link represent the most inteligent use of ProE. Big school for me...