Enter the username and password you have been provided to log in. Credentials are specific to each library.
The bar has turned black. if it is not black you are not logged in
Now you need to go to your sandbox where you will be able to build books. Put the mouse pointer over the far right of the black bar and left click once to drop a menu down
Select Your Sandbox, and left click on it and you will be taken to Your Sandbox (box on far right) where you can create and edit LibreTexts as well as access instructional materials (grey bar and two boxes to the left)
The bar is slightly different when you are actually in the Sandbox. Notice the Edit and New buttons