"Do you want to make 500 pounds? If you do and are willing to earn it, write to..."

So reads the handbill thrust on Car Fairfax. He is literally down and out, for the soles of his shoes had gone long ago and the uppers show a crack which mean doom to his hopes of a job. And he has just met Isobel: Isobel whom he had not seen for three long, weary years.

But Car's road back to fortune is beset by mystifying experiences involving his cousin Anna; a precise gentleman in neat clothes and pince-nez; and a job whose sole duties - apparently - consist of dining in a...

"Beware - walk with care,
Or mumbo jumbo will hoodoo you.

Young Jeremy Ware is suspected of stealing important papers, and Colonel Garrett of the Secret Service (last seen in Danger Calling) consults Benbow Smith about it. Even Rosalind Denny, still grieving for her late husband, suspects Jeremy. But when the young man, trying to exonerate himself, meets a beautiful sleepwalker in a cellar, matters quickly progress to a case of murder...

Walk with Care was originally published in 1933, and was the third novel to feature the series...