tool hides the letters of the album and band name in the letters of the song names on all their albums except undertow which has a secret track list in the cd booklet there are lyrics from all the songs but they are out of order reorder the songs on undertow to match the out of order lyrics im not sure why tool does this but this is why the album names are the way they are they usually give you hints in the album artwork like how the us in lateralus is dropped slightly and the music videos are actually instructional videos which are supposed to tell you how to rearrange the songs aenima is actually 2 words that both end with NIMA they are ANIMA and ENIMA this is why the A and E are joined together in the album artwork so you find TOOL ANIMA ENIMA which is only 14 letters and there are 15 songs the last song H. acts as a sort of spacer and goes next to jimmy which also creates a sort of a signature "Jimmy H." the reason the song aenema is spelt differently from the album title is because the E in aenEma is the E in the word Enima the reason there are 4 track lists goes back to secret track 69 on undertow after you wake up in your ditch you walk to your red car the 4 track lists are supposed to represent the 4 car doors