CLBGamer: Before I try this solution with the Tombs whats normally suppose to happen when you go through The Haunting level without getting all the Tombs, by that I mean what level do you actually go to next?
Each Blood episode has a secret level, but to go to the secret level you have to find the alternate end-level switch (EndingB). In the case of the episode, "Even Death May Die", "The Overlooked Hotel" has two end-level switches.
If you find all the tomes, a teleporter pad is activated in a specific part of the map, and you can use it to get to the EndingB switch, which will take you to "Thin Ice".
If you flip the normal EndingA switch, you will go to "The Haunting".
If you find all the tomes, and you still flip the EndingA switch, you will go to "The Haunting". You have to flip the EndingB switch to get to "Thin Ice".