volume 1 can be read until the sim has reached level 4 of the skill volume 2 can be read from between level 4 and level 7, and volume 3 can be read after level 7. each skill book has three different volumes. This is a complete list of books that can be found in the sims 4. The sims book | the sims 4 best custom content, free mods, maxis match, sims 4 cc, fan made stuff pack, animations, the sims 4 cheats.