I loved these books as a child! While the plots might be dated the characters are timeless. Maybe your early "chapter book" reader would enjoy them!
Some info on the authors -
Laura Lee Hope is a pseudonym used by the Stratemeyer Syndicate for the Bobbsey Twins and several other series of children's novels. Actual writers taking up the pen of Laura Lee Hope include Edward Stratemeyer, Howard and Lilian Garis, Elizabeth Ward, Harriet (Stratemeyer) Adams, Andrew E. Svenson, June M. Dunn, Grace Grote and Nancy Axelrad.
Laura Lee Hope was first used as a pseudonym in 1904 for the debut of the Bobbsey Twins.