Recs if you like Death at the President's Lodging (Sir John Appleby, #1)...

If we are going to do Qwordy's the Hardest Reading Challenge You'll Ever Do 3.0 - we should probably get some Pagebound badges along the way! I'm specifically going to be adding books from Quests and readalongs that go past the July start date and match at least one of these title prompts: Periodic Table, Familial Terms, Rainbow of Words (also Joseph's coat), Numerical Titles, Titular Counting 5+, Pun in the Title, and First & Last Name in the Title. Recommendations welcome!

Whodunnits published between WWI and the 1950s