In this day and age, there is not much need to store text books in bookshelves, as they are available in different sources, such as the LibreTexts for Physics or LibreTexts for Chemistry.  While not all topics are available yet, it seems more and more are becoming available, although there is still more needs for experimental textbooks, a few are available:

1) Online Laboratory (calculus-based introcutory physics)

2) Advanced Experimental Methods (on AFM, NMR, Lithography)