How old are they? What are their interests? Literally anything can be a good bedtime read if it hits the right spot but what I would suggest for, say, an 18 month old, a 4 year old, a 7 year old or a 10 year old would be very different so a bit more guidance could be useful (assuming this isn't just an advertisement for the linked collection?)
I'm going to stick with the 3-5 picture book age for now, based on the limited information we have. My favourite 'gentle' calming reads (as personally that's what I prefer to read at bedtime, saving the humorous or adventure packed ones for the daytime, but obviously any bedtime story is better than no bedtime story so if that's the only time of day you have to read you may wish to include more 'exciting' tales) include:-
Night Monkey, Day Monkey (Julia Donaldson)
One Bear at Bedtime (Julia Donaldson)
Peace at Last (Jill Murphy)
Whatever Next (Jill Murphy)
Lost and Found (Oliver Jeffers)
How to Catch a Star (Oliver Jeffers)
The Best Kind of Bear (Greg Gormley)
Princess Sleepyhead and the Night-Night Bear (Peter Bently)
A Home Full of Friends (Peter Bently)
Ella's Night Lights (Lucy Fleming)
The Boy and the Bear (Tracey Corderoy)
Here Comes the Sun (Karl Newson)
Together (Charles Fuge)
Percy the Park Keeper series (Nick Butterworth)
Elmer series (David McKee)
Ten Minutes to Bed series (Rhiannon Fielding)
Honestly though there are far too many amazing reads out there to list. Join the library, let them choose books and experiment. They'll soon find their own favourites.