Some libraries may also have the Bakemonogatari novel. You can check with your local library's catalogue, either in person or through their online system. If they have it, you can borrow it and read it for free. Just make sure to return it on time.
There are quite a few. The light novels often have more detailed character development and background stories. The anime might focus more on visual presentation and pacing.
In general, the Bakemonogatari manga doesn't undergo substantial changes. It retains the key elements and plot points from the source material. Some minor tweaks might be there for better visual presentation or to fit the comic format, but they don't deviate much from the core.
Another possibility is a crossover with a game - based world, say 'The Legend of Zelda'. Link could find himself in the bakemonogatari universe, having to use his skills to navigate through the strange situations involving oddities. His sword - fighting abilities would be put to the test in a whole new way.
If the crossover is with a magical girl series, a character like Hanekawa Tsubasa could be interesting. Her intelligence and her own experiences with the supernatural in bakemonogatari could make her a bridge between the two different universes, perhaps learning new magical powers or sharing her own knowledge.