Light Novel Volume 04

Heavy Object: Theoretical Vein (ヘヴィーオブジェクト 電子数学の財宝, Hevī Obujekuto: Denshi Sāgaku no Zaihō, lit. "Treasure of Electron Mathematics") is the fourth volume of the Heavy Object light novel series, released on September 10, 2011.

Publisher's Summary
Miniskirt Santa! Tsunpri Princess and big breasted Froleytia are miniskirt Santas ......! What is heck, what kind of foreshadowing is this for Quenser and Heivia!? Futuristic action!

Chapter List

 * Prologue
 * Chapter 1 - What Should Have Been a Pure Blue Ocean >> Unofficial Battle in the Loyauté District
 * Chapter 2 - Christmas on a White Sand Beach >> Furlough Garrison Battle (?) in the Oceania District
 * Chapter 3 - The Treasure of the Sea Dyed Deep Red >> Defensive Battle in the Solomon District
 * Epilogue

Trivia

 * The novel's subtitle refers to the method of artificial platinum production which Roybelz Oldnick supposedly has knowledge of.