[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8},"actionData","errors","root",{"_9":-5,"_87":-5,"_88":89,"_90":91,"_92":93,"_94":95,"_96":97,"_98":99,"_100":12,"_101":102,"_103":104,"_105":106},"routes/_store+/_readers+/u.$username/route",{"_9":10,"_11":12},"user",{"_13":14,"_15":16,"_17":18,"_19":16,"_20":16,"_21":22,"_23":24,"_25":16,"_26":16,"_27":16,"_28":16,"_29":-5,"_30":-5,"_31":-5,"_32":33,"_34":35,"_36":12,"_37":38,"_39":40,"_41":42,"_43":44,"_45":46,"_47":48,"_49":50,"_51":52,"_53":54,"_55":56,"_57":58,"_59":60,"_61":62,"_63":64,"_65":66,"_67":68,"_69":70,"_71":-5},"isPreview",false,"name","Luis Guo","githubname","","username","system-design","instagramname","linkedinname","profileBlurbWithNofollow","

dfadsfasd

","twittername","sdafads","youtubeUrl","facebookUrl","youtubeName","mastodonName","tiktokName","blueskyName","redditName","profileLaunchVideos",[],"publicProfile",true,"mediaSheetAvailable","reviewDisplayPreference","none","profileReviews",[],"avatarX512",{"_84":86},"avatarX1024",{"_84":86},"publishedBooks",[72],"unpublishedBooks",[],"retiredBooks",[],"publishedCourses",[],"unpublishedCourses",[],"retiredCourses",[],"publishedBundles",[],"publishedTranslations",[],"unpublishedBundles",[],"retiredBundles",[],"publishedTracks",[],"unpublishedTracks",[],"retiredTracks",[],"latestPodcastEpisode",{"_73":74,"_75":76,"_77":78,"_79":80,"_81":14,"_82":83},"id","Z2lkOi8vbGVhbnB1Yi9TdG9yZTo6Qm9va1Byb2R1Y3QvNjE5NjY","slug","systemdesigntest","title","System Design Test","publisherSlug","leanpub","authorString","coverHero2x",{"_84":85},"url","https://d2sofvawe08yqg.cloudfront.net/systemdesigntest/s_hero2x?1734827595&1734827595","https://d39qdlcrvnra4b.cloudfront.net/avatars/3413868/original/44afc9b4-f9a6-491f-aba8-63675173d726.jpeg?1734827735","shoppingCartId","shoppingCart",{"_73":119,"_120":121,"_122":35,"_123":16,"_124":125,"_126":127,"_128":35},"locale","en","readerTheme","light","constants",{"_117":118},"publishers",{"_113":114,"_115":116},"learnerOrganizations",[],"needsLocaleCookieSync","announcements",{"_107":108,"_109":-5},"sentryEnvironment","production","sentryRelease","6fe10f559071ebddc126dff7920d1c791463de15","announcement_store",{"_110":12,"_111":112},"announcement_authors","flag","text","

Kick off your book project, get started with GhostAI, get better at marketing, or spend the day doing all three! Free live workshops on Zoom. Saturday, June 27, 2026.

\n","companies",[],"universities",[],"paypalClientId","AX53Cwz8jR6rVVzzZiZNWWXl0dGagi-GZrjG-S3Ua14E5nrKMn7DxDQ730O4R8LusLPp49ALn6aRVaEy","no-cart","count",0,"free","updatedAt","paymentGateway","STRIPE","cartItems",[],"loading"]

Luis Guo

About Luis Guo

Books by Luis Guo

Find your next book on Leanpub.