I know of a very good story that is, unfortunately, not finished and has not been updated since 2014. If you might be interested anyway here it is. Spirit Animal Tales. Summary: Dean didn't become a Sentinel until after he gets back from hell, and panicked from all the sensory overload and thought he was going crazy. But Sam has read Everything Ever and suspects what's going on, needs to confirm it and so he kidnapped the world's expert in Sentinels. Jim is not amused.
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Spirit Animal Tales. Summary: Dean didn't become a Sentinel until after he gets back from hell, and panicked from all the sensory overload and thought he was going crazy. But Sam has read Everything Ever and suspects what's going on, needs to confirm it and so he kidnapped the world's expert in Sentinels. Jim is not amused.
https://www.fanfiction.net/s/10492151/1/Spirit-Animal-Tales