"Very well. Let's at least do what we can to secure the library and prevent easy entry by an enemy. Turi - can you jury-rig the door and attempt to bar entry? I will review my spells to see if I can assist you in any way..." responds Vershab, placing the scroll carefully back on the table and pulling his spellbook from his pack, reviewing his options carefully...
Spoiler: MechanicsTuri could use a Disable Device check to try and jam the door, perhaps taking 20 to ensure a high DC to open it...?
"Alright, I will cast a spell to alert me if anyone passes this way, but I must be within one mile for it to work. In addition, an abjured door will be harder to bypass, so I can lock it with a spell. I will then open the way to an extraplanar space where we can rest, though there will be a rope visible to anyone who looks for it. Where shall I cast the spell so we may rest?"