Jeffrey Lord is a 'house name' used for the 37-book Richard Blade Sword-and-Sorcery series "produced" by Lyle Kenyon Engel.
Manning Lee Stokes wrote 1 to 8 of the sequence; 9-29 and 31-37 were by Roland Green; Ray Nelson contributed a single title, number 30 in the sequence. The Richard Blade series includes adventures set in other Dimensions or Parallel Worlds with an sf flavour. - www.sf-encyclopedia.com