Bats Fly at Dusk, the seventh novel in Gardner's 30-novel Cool and Lam series, his lesser-known series compared to his Perry Mason series, defies the whole premise of the series, the pair of mismatched private detectives. Published in 1942, when all able-bodied men are enlisting in defense of the country, the book opens with Donald Lam off in the Navy and Bertha Cool on her own without her brainy counterpart. Donald makes brief appearances though via telegrams from San Francisco. But, this is Bertha on her own, bumbling, greedy, sometimes a bit clueless. It is an interesting twist for the series to have Abbott without Costello or Laurel without Hardy. or Batman without Robin.
Bertha, even by herself, is loads of fun. "Fry me for an oyster," she exclaims, as well as "Pickle me for a herring." She calls people "little pipsqueaks" amd "mama's smart boy." Bertha, if you recall, is a heavyweight fireplug of a detective and, here, we get her doing the legwork, climbing the steps to an apartment, negotiating the steps one at a time with jerky steps. But, what makes her Bertha is how she "invades" a room and "dominates the situation." She is loud, abrasive, and just an all-around fun character.
The story revolves around a blind beggar who wants to know what happened to a young woman who walks by his corner daily, but appears to have been hit by a car. The blind man does not know her name or much about her, but is concerned. He does know she is twenty-five or twenty-six, slender, about 106 or 107 pounds, and about five feet, four inches tall.
The story gets a bit convoluted from there as the secretary, Josephine Dell, is not apparently interested too much in a settlement, although a mysterious stranger, Jerry Bollman, is interested in honing in on a settlement. Also, the secretary's employer, Harlow Milbers, mysteriously just died and she is unconcerned, but due to inherit some money.
When Bertha investigates the employer's family, she finds Paul Hanberry, who "seemed very much a masculine nonentity, drained dry by the relatively stronger personalities of the two women. He was of average height, average weight; a man who created no particular impression. As Bertha Cool expressed it afterward in her letter to Donald Lam, 'You could look at the guy twice without seeing him.'" It is marvelous descriptions like this that make Gardner's writing a pleasure to read.
Indeed, this story is chock-full of humorous asides, like the will where the dead employer calls his only living relative, a "damned hair-splitting hypocrite."
Eventually, by barging in here and there, Bertha discovers someone had been murdered. Bertha proves that she can operate on her own without the brainy Donald doing all the thinking and all the legwork.