The Birthday on Lovelace Lane by Alice Ross

Architect Mike Hylton has a significant birthday looming. One he’d much rather forget about. Not that there’s much chance of that. With all the residents of Lovelace Lane acting strangely, he strongly suspects celebratory plans are afoot.
However, an unwelcome birthday surprise, and a mid-life crisis, aren’t the only things Mike has to worry about. His business is seriously struggling and his only chance of saving it is to win the lucrative contract on Highwater Hall. But with a younger rival also in the running, just how far is Mike prepared to go to secure the deal?