Ode to a Banker

Ode to a Banker is a 2000 historical mystery crime novel by Lindsey Davis and the 12th book of the Marcus Didius Falco Mysteries series. Set in Rome between July and August AD 74, the novel stars Marcus Didius Falco, informer and imperial agent. The title refers to both the poetry that leads Falco to the Chrysippus scriptorum and to the bank that is the Chrysippus family's other business.
Plot summary.
When Marcus Didius Falco gives a poetry reading for family and friends, things get a little out of hand. The event is taken over by Aurelius Chrysippus, a wealthy Greek banker and patron to a group of struggling writers, who subsequently offers to publish Falco's work, which Falco turns down as being a raw deal. Unfortunately, soon afterwards Chrysippus is brutally murdered, with part of a broken scroll jammed up his nose, and due to his presence at Chrysippus' "scriptorium" Falco is implicated in his death and forced by his friend Petronius Longus, the enquiry chief of the vigiles, to investigate.
The result is a trawl through the literary and financial worlds of Ancient Rome, as Falco delves deep into Chrysippus' personal life and business history. Falco's investigations reveal that the deceased Chrysippus (Greek: "Golden Horse") was owner of the Golden Horse Bank, and many potential suspects are turned up, including disgruntled writers employed by Chrysippus’ "scriptorium", a shipper Pisarchus who has fallen on hard times, as well as his family: Chrisyppus' widow Vibia, his ex-wife Lysa and his son Diomedes. Meanwhile, things get worse: one of the suspected writers, Avienus, is found dead and Falco and his friend Petronius are also attacked, although they manage to survive and kill the assassin. To add insult to injury, Falco also faces problems with his own family: his estranged father Geminius has problems coping with the death of his mistress, Flora, and Falco's nemesis Anacrites is slowly ingratiating himself with Falco's own mother, persuading her to place her savings with his own at the Golden Horse Bank — which, unfortunately for the two and Falco, goes insolvent.
Falco initially suspects Pisarchus because Pisarchus has recently gone into insolvency, but soon discounts that motive as being insufficient for murder after consulting his banker and his father for advice. Running out of time and options, Falco plays a desperate gambit — bring together Chrysippus' family and his associates who are directly implicated in the murders at a conference at the Chrysippus home for questioning, along with Helena and the vigiles, who have been assisting Falco so far. Eventually, the murderer is identified and it's none other than Diomedes, identified by his accidentally revealing knowledge of how Chrysippus was found dead, and with further corroborating evidence collected during investigation or provided by witnesses at the time of the crime. The novel ends on an ominous tone, with Diomedes being sentenced to a gruesome death, and Falco brooding over tensions between his family and Anacrites, who has tried to woo Maia but was spurned by her.