1,407. Reading from a Book of Kesuvim

Hilchos Megillah v’Chanukah 2:8

One may not read the megillah for a congregation from a scroll that includes the other books of Kesuvim (the Writings); if one does do so, no one fulfills their obligation unless the sections of parchment on which the megillah is written are larger or smaller than the others, setting it apart. An individual may read the megillah for himself from a scroll that includes the other books of Kesuvim even if the section containing the megillah is not larger or smaller than the rest of the scroll, and doing so fulfills his obligation.

Hilchos Megillah v’Chanukah 2:9

A megillah may only be written with ink on the types of parchment known as “g’vil” and “klaf,” the same as is the rule for a sefer Torah. Gall nut juice and vitriol may be used but no other form of dye. The megillah must be written on scored lines, the same as a Torah scroll. Unlike a Torah, the parchment need not have been processed with the intention that it was going to be used for this mitzvah. If a megillah was written on paper, on un-processed animal skin, by a non-Jew or by a Jewish non-believer, it is invalid.