The Gates of Limbo (Xavier #5) - E M Cooper - Bog

In the countdown to the Battle of Reckoning, Xavier assumes leadership and guides his friends, angels and wizards with the help of The Celestial Ledger, the Lithos and the Fabric. Drawn to the Spiral of Mourn at the centre of the multiverse, all the key players will face their destiny and own their truths. In their final test, Xavier and his friends will confront demons, gargoyles, the Darklaw and Eledore. At stake is the freedom of all Griswold College's children, living and dead.