Reddit reviews Moral Psychology: A Contemporary Introduction (Routledge Contemporary Introductions to Philosophy)

There's "Moral Psychology: A Contemporary Introduction" by Tiberius but it also considers philosophical considerations.

I'd recommend Robert C. Roberts work on this. He's a world class scholar in this area. Here's the first in his trilogy that lays out his theory of emotion: https://www.amazon.com/Emotions-Essay-Aid-Moral-Psychology/dp/0521525845/ref=pd_rhf_ee_s_pd_session_scf_1_5?_encoding=UTF8&pd_rd_i=0521525845&pd_rd_r=HJHTF314S1M3CA84YQCT&pd_rd_w=jUkky&pd_rd_wg=np4ik&pf_rd_i=desktop-rhf&pf_rd_m=ATVPDKIKX0DER&pf_rd_p=3505674102&pf_rd_r=HJHTF314S1M3CA84YQCT&pf_rd_s=desktop-rhf&pf_rd_t=40701&psc=1&refRID=HJHTF314S1M3CA84YQCT

Here's his second book: https://www.amazon.com/Emotions-Moral-Life-Robert-Roberts/dp/1107576377/ref=pd_bxgy_14_2?_encoding=UTF8&pd_rd_i=1107576377&pd_rd_r=9ANGX14W48SAVDV494B6&pd_rd_w=eQyZr&pd_rd_wg=D2dIc&psc=1&refRID=9ANGX14W48SAVDV494B6

And here's the Oxford Handbook. I'm currently reading through it: https://www.amazon.com/Oxford-Handbook-Philosophy-Emotion-Handbooks/dp/0199654379/ref=pd_sim_14_4?_encoding=UTF8&pd_rd_i=0199654379&pd_rd_r=9ANGX14W48SAVDV494B6&pd_rd_w=GPled&pd_rd_wg=D2dIc&psc=1&refRID=9ANGX14W48SAVDV494B6

Also, the area of philosophy that deals with this topic is moral psychology. I'd definitely check out this intro: https://www.amazon.com/Moral-Psychology-Contemporary-Introduction-Introductions/dp/0415529697/ref=sr_1_2?s=books&ie=UTF8&qid=1518110231&sr=1-2&keywords=moral+psychology

Hope this helps!