The red book Secrets of the journal is exclusive to Elona+. It can be found on the first floor of The Adventure Seminar. It doesn't generate randomly. It covers the journal.
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The secrets of the journal
by a PRO journalist
I see you've gotten your hands on the latest fad that everybody's gotta have - the Autoscribing Journal. But have you been putting it to good use?
The journal doesn't just list the quests undertaken by you - it also has the difficulty of each one of them.
The level (Lv) indicated is that of the target monster's, buuuut you probably don't have to be of that level to defeat it. If you're armed to the teeth, you could manage with, eh, maybe 60% of the monster's level? Not all quests involve combat, so there's that too.
The journal also automagically keeps track of the number of times the holder has done something. Turn on Record in the Settings, and you'll be good to go.
It's also got an uplink to town informers, so you can also check up on what your colleagues are doing while on the go. Oh, and it also has your guild quotas and rankings.
So yeah, have a look at it when you forget where you're supposed to go or if you wanna see how you've been doing.