As a number of other people have had this issues as well.
The issue. Not being able to reach the crucible.
When roan give you the book it drops to the ground.
When you talk to elsa she doesn’t recognise the book.
Solutions.
One solution i have seen people reporting is to load a save state. This didnt work for me.
Another solution. Make sure you have space in the runes section of your inventory. For whatever reason the book looks for space here and not the special items section where it is place. This solution worked for me.