I'm looking for a hostel to stay in  Granada and the White Nest which was recommended by a friend is fully booked.
Are there any others that are still nice and around the 17 Euros?

Backpackers Hostels offer dormitory accommodation with a locker to put your possessions.
They normally have a communal kitchen which you can use to cook your own food.
They usually have free wifi, most of the guests are under 25.
The price is normally around 17 euros per person per night.

Here are the main ones in Granada

For a quick summary with some independent advice click here
https://granadahotel.com/backpackers.htm

Oasis backpackers hostel in Granada center
https://oasisgranada.com/en/default.html

Makuto Guest House Granada
https://makutoguesthouse.com

White Nest Hostel Granada
https://nesthostelsgranada.com

Funky Backpackers Hostel - Granada
Seems to have very bad reviews and I can't find its own website.

Granada Inn
I have had good reports of this place. It is not a party hostal.
https://granadabackpackers.es/


Note:

There is a list of cheap hostals and pensiones here
Click here for Cheap hostals and pensiones in Granada