Yes, a signature is required at delivery. If you are not able to sign for your package, you can either get someone else to sign at your address, or have the package delivered at an address where there will be someone who can sign for you. You can also see if the shipping company offers the opportunity to sign a power of attorney by which you allow the package to be delivered without a signature. Check what can be done with the shipping company.
If no agreement has been made, UPS/GLS will make three attempts to deliver your package. After three tries UPS/GLS will return your package to Wiley X EMEA LLC.