Regular international hotel booking sites offer a variety of hotels in Lund (e.g. booking.com).
Lund has its own site - visitlund.se - where you can find accomodation here: https://visitlund.se/en/accomodation-and-travel
But below you find some links to hotels in the center of Lund, that we can recommend:
Central location
Fancy and traditional:
Grand Hotel: https://www.grandilund.se/en/home.html
Nice and cosy:
Concordia: https://www.concordia.se/en.aspx
Bishop's arms: https://www.elite.se/en/hotels/lund/hotel-bishops-arms/#rooms
Hotel Nordic Lund: http://nordiclund.se/en/
Hotel Oskar: https://www.hotelloskar.se/en
Lilla Hotellet: https://lillahotellet.com/
Magle's Smiley Inn: http://smileyinn.se/
Modern:
Hotell Lundia: https://www.lundia.se/sv/default.html
Hostel:
Winstrup Hostels: https://www.winstruphostel.se/en-GB
A bit further away - west side of railroad and 15 min walk from Campus (!)
Cosy:
Millas Villa: https://www.millasvilla.se/en