 If you liked
Death Note
|
 ...then you might like
Remote
|
Detective stories with one quirky detective. Remote deals with a series of cases and has a two-person investigation tag-team as compared to Death Note's single case and villain protagonist setup, but if you're into reclusive, sometimes misanthropic, and generally unconventional detectives, both L and Himuro have you covered.
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Recommended by lithiumflower
Both have investigations and mystery. Both titles have extremely intelligent characters who use others to do the leg work (to an extent).
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Recommended by Ichinose_Kotomi