Here's another book review, I'm almost done with this one. The Atrocity Archives by Charles Stross. In this story computers and mathmatics can open doorways to alternative worlds where brilliant as well as idiot monsters are waiting to come through. The hero works for The Laundry, a government agency that deals with these things. The book is full of exciting and gruesome encounters. The hero may kill a tentacled creature that is trying to kill him and his new lady friend, but instead of thanks he is hounded by accounting who want him to explain why he came in late and to fill out the necessary paperwork justifying the expense of cleaning up the mess.