I may add a reward category to them so they spawn there a little more frequently too. Also gave them less HP and recategorized to books so they are more easily sorted for storing. Weird how Core RW seems to assign no tradetag to books... hm.

--
<Defs>
<ThingDef ParentName="ResourceBase">
<defName>RWE_Map</defName>
<label>Map</label>
<description>A map of a settlement.</description>
<graphicData>
<texPath>Items/RWE_MapItem</texPath>
<graphicClass>Graphic_Single</graphicClass>
</graphicData>
<rotatable>false</rotatable>
<stackLimit>1</stackLimit>
<tradeNeverStack>true</tradeNeverStack>
<tradeNeverGenerateStacked>true</tradeNeverGenerateStacked>
<neverMultiSelect>true</neverMultiSelect>
<thingCategories>
<li>Books</li>
</thingCategories>
<statBases>
<DeteriorationRate>1</DeteriorationRate>
<MarketValue>250</MarketValue>
<MaxHitPoints>20</MaxHitPoints>
<Mass>0.1</Mass>
<Flammability>1</Flammability>
</statBases>
<tradeability>Sellable</tradeability>
<tradeTags>
<li>Art</li>
</tradeTags>
<comps>
<li Class="RimworldExploration.ReadMapCompProperties">
<size>7</size>
<locations>1</locations>
</li>
</comps>
<techLevel>Neolithic</techLevel>
</ThingDef>
</Defs>
--