You can start reading Tabatha Kiss at any series.
Some series can be read as stand-alones in any order but I recommend starting a series from the beginning and following the Character Map from there.

Sweet Cravings Series

Sugary sweet. Sinfully dangerous. Romantic comedies with an edge of suspense!
Series without cliffhangers. For best experience, read in order.

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Muffin Top, #1

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A Muffin Top Christmas, #1.5

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Hot Sauce, #2

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A Hot Sauce Halloween, #2.5