Item 'a troglodyte assassin's spelbok' is type spellbook, alignment -400, made of scales,
has keywords 'spellbook troglodytes spelbok fish guts tree bark assassins'.
This item weighs 0 stones and 34 pebbles, and is valued at 130,800 gp.
This level 241 item has the attributes: nodecay no-dispel nodecay-vanishes-on-expiry
Can hold up to 4 spells with a maximum of 142 complexity points.
Contains the scribed spell(s) 'camouflage, cause light, invisibility'.
Alters knowledge of 'feign presence' by 20%.
Alters knowledge of 'hide' by 20%.
Alters knowledge of 'slit throat' by 20%.
Alters knowledge of 'strike down' by 20%.
Affects hp by 50.
Affects SCC by -10.
*Your archon-level must be greater than or equal to 70 to use this item.
*Your race must be something other than human to use this item.
*Your race must be something other than gnome to use this item.
*Your race must be something other than half-elf to use this item.
*Your race must be something other than dwarf to use this item.
*Your race must be something other than elf to use this item.
*Your race must be something other than halfling to use this item.
This item has 1 empty Relic bindings.
*This item may be repaired 4 times.
The troglodytes are not only good at magic, they're aggressively bad at
magic.  Large, lurching and dim, most of them simply don't have the mental
fortitude to handle complex rituals, length memorization processes, or the
rigor to practice arduous spellcasting processes.  This spelbok reflects
that well: it technically is magical, and contains instructions for how to
cast spells, but it's not very sophisticated, advanced or interesting- at
least not in terms of magic.  

Long description: A spellbook made of fish guts and tree bark is here.
This item can be found in Sigil.