The most recent version of the Spain guidebook says that there is a combo ticket for Casa Milà (La Pedrera) for 45 euros that allows entrance for both a timed daytime visit as well as a night visit. I am not able to find where to purchase this. Was this option discontinued, or am I just not looking in the right spot. I think that i have looked all over the official web site, and also looked at 3rd party sites like GetYourGuide and Viator.
These are the ticketing options currently available:
https://www.lapedrera.com/en/plan-your-visit/rates
It seems they've eliminated the day/night combo ticket mentioned in the guidebook.