The Cranefly Orchid Murders (Martha's Vineyard Mystery Series #2) Book

Greedy developer buys acreage from an elderly woman, Phoebe, promising her she could live out her days at her home. But, Loch Ness wants to build mansions on three acre plots ASAP.
Our girl, Victoria, find the dead body of a shady lawyer and discovers the land grab. She is asked by a conservationist to find an endanger species on the land to stop the building. Victoria and Robin find several cranefly orchids, but then they are removed. No native species are planted in their stead.
Victoria and Robin find the estranged son, Ulysses, of Phoebe living under ground.
Loch Ness is found drowned and his wife, Crystal, decides to give the land to the conservatory. Ulysses will be the caretaker. She also gives 1000 acres of land in Nevada to the environmental/survivalist group if they will name their home the Loch Ness Ranch.
Miranda, the lawyer's wife and the mistress of Loch Ness is the murderess. She didn't want her husband to have any of her money and Loch Ness was going to become faithful to Crystal.