If you enjoyed the alt-history romp of 'My Lady Jane' with its blend of heart-flutters and swashbuckling, I'd point you toward certain books that capture that same spirit of playful anarchy mixed with genuine affection. 'Sorcery of Thorns' by Margaret Rogerson comes to mind, where a librarian apprentice teams up with a mysterious sorcerer to save magical grimoires; it has that brisk adventure pace and a wonderfully banter-filled relationship that builds amidst the chaos. 'The Gentleman's Guide to Vice and Virtue' by Mackenzi Lee is another fantastic pick, following a disastrous Grand Tour of Europe with a lovable rogue protagonist, his best friend, and his sharp-witted sister—it’s packed with highwaymen, alchemical mysteries, and a slow-burn romance that feels earned.
For something with a bit more historical fiction grounding but still that vibrant character-driven energy, 'A Tale of Two Castles' by Gail Carson Levine offers a charming medieval mystery with a shapeshifting dragon and a clever ogre, though the romance is more subtle. The 'Stalking Jack the Ripper' series by Kerri Maniscalco might also hit the spot, blending forensic investigation in Victorian London with a fiercely intelligent heroine and a tantalizing will-they-won’t-they dynamic with a mysterious coroner’s apprentice. What ties these together isn’t just the genre mash-up, but the feeling that the characters are having a grand, perilous time even when swords are drawn, and the romantic tension feels like a natural part of the escapade rather than a separate plot thread.
I’d also sneak in a recommendation for 'The Princess Bride' novel by William Goldman if you haven’t read it; the book has the same meta, tongue-in-cheek narration and perfect balance of adventure, romance, and comedy that makes 'My Lady Jane' so delightful. The key is finding stories where the partnership feels essential to the quest, and the danger makes the heartfelt moments shine brighter—that’s the specific alchemy you’re probably chasing after.