As of my knowledge cutoff date in September 2021, Nevermore 3 has not been released as a German book. However, it's always best to check with local bookstores or online retailers for the most current information on book availability. **

Full-face helmets provide more protection for the face and jaw in the event of a crash, making them better for more aggressive and high-speed cycling such as downhill mountain biking or BMX racing. However, for general cycling, half-shell helmets are often preferred due to their lighter weight, better ventilation, and less restrictive feel. The choice between the two depends on the type of cycling and the level of risk involved. **

Yes, it is necessary to have bicycle helmets. Wearing a helmet while riding a bicycle can significantly reduce the risk of head injury in the event of a crash or fall. Helmets provide crucial protection for the brain and skull, and can potentially save lives. It is important for both children and adults to wear helmets while cycling to ensure their safety on the road. **

Yes, you may install LED lights on your bicycle. LED lights are a popular choice for bike lights because they are energy-efficient, long-lasting, and provide bright illumination. Adding LED lights to your bicycle can improve your visibility to others on the road, especially in low-light conditions, and help enhance your safety while riding. Just be sure to check your local regulations to ensure that the installation and use of LED lights on bicycles comply with any specific laws or requirements in your area. **

Yes, there are bicycle accessories that make noise. For example, some bicycles have bells or horns that can be used to alert others of your presence. Additionally, some riders may attach accessories such as spoke clackers or playing cards to their wheel spokes to create a clicking or rattling sound as they ride. These accessories can be useful for safety and visibility, especially in crowded or noisy environments. **

Bicycle traffic lights have two red lights to make them more visible to cyclists. The two red lights are placed side by side, making it easier for cyclists to see the signal from a distance and in their peripheral vision. This helps to ensure that cyclists can clearly see when they need to stop, promoting safety at intersections. Additionally, the two red lights can help prevent confusion or misinterpretation of the signal, as it is clear that both lights being red means the cyclist must stop. **

When the bicycle brake locks the wheel, the wheel stops spinning and skids along the ground. This can cause the rider to lose control and potentially crash. Additionally, the tire tread can wear down quickly and the tire may even blow out from the friction. It's important for riders to be aware of how to properly use their brakes to avoid locking up the wheels. **

The sentence "Now I come once more and then nevermore" from "Brüderchen und Schwesterchen" makes them scared because it implies that someone or something will come one more time and then never return. This creates a sense of finality and foreboding, leading the characters to fear what will happen after that final visit. If they had not been scared and instead confronted the source of the statement, they may have been able to uncover the truth behind it and potentially change their fate. **