All My Summons Are Hidden Bosses

Looking for Imaginative Summoning Novels, I Can't Stand Cliche Plots

I'm tired of the same old tropes and copycat stories. Any recommendations for imaginative novels without major flaws or glaring plot holes? For example, one where you can create your own summoning spells and summon things that correspond to a world you have in mind. Then you can make a contract with them or kill them to get drops, or...